X-Git-Url: https://git.toastfreeware.priv.at/chrisu/seepark.git/blobdiff_plain/e011965de19438e11aeb840fb2b5fe9220b734df..f814ae7739687e75239e1a830896aa099c38ead3:/web/static/d3.js?ds=inline

diff --git a/web/static/d3.js b/web/static/d3.js
index 599013c..9af5650 100644
--- a/web/static/d3.js
+++ b/web/static/d3.js
@@ -1,17 +1,17 @@
-// https://d3js.org Version 4.12.0. Copyright 2017 Mike Bostock.
+// https://d3js.org v5.7.0 Copyright 2018 Mike Bostock
 (function (global, factory) {
-	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
-	typeof define === 'function' && define.amd ? define(['exports'], factory) :
-	(factory((global.d3 = global.d3 || {})));
+typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
+typeof define === 'function' && define.amd ? define(['exports'], factory) :
+(factory((global.d3 = global.d3 || {})));
 }(this, (function (exports) { 'use strict';
 
-var version = "4.12.0";
+var version = "5.7.0";
 
-var ascending = function(a, b) {
+function ascending(a, b) {
   return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
-};
+}
 
-var bisector = function(compare) {
+function bisector(compare) {
   if (compare.length === 1) compare = ascendingComparator(compare);
   return {
     left: function(a, x, lo, hi) {
@@ -35,7 +35,7 @@ var bisector = function(compare) {
       return lo;
     }
   };
-};
+}
 
 function ascendingComparator(f) {
   return function(d, x) {
@@ -47,18 +47,18 @@ var ascendingBisect = bisector(ascending);
 var bisectRight = ascendingBisect.right;
 var bisectLeft = ascendingBisect.left;
 
-var pairs = function(array, f) {
+function pairs(array, f) {
   if (f == null) f = pair;
   var i = 0, n = array.length - 1, p = array[0], pairs = new Array(n < 0 ? 0 : n);
   while (i < n) pairs[i] = f(p, p = array[++i]);
   return pairs;
-};
+}
 
 function pair(a, b) {
   return [a, b];
 }
 
-var cross = function(values0, values1, reduce) {
+function cross(values0, values1, reduce) {
   var n0 = values0.length,
       n1 = values1.length,
       values = new Array(n0 * n1),
@@ -76,17 +76,17 @@ var cross = function(values0, values1, reduce) {
   }
 
   return values;
-};
+}
 
-var descending = function(a, b) {
+function descending(a, b) {
   return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;
-};
+}
 
-var number = function(x) {
+function number(x) {
   return x === null ? NaN : +x;
-};
+}
 
-var variance = function(values, valueof) {
+function variance(values, valueof) {
   var n = values.length,
       m = 0,
       i = -1,
@@ -116,14 +116,14 @@ var variance = function(values, valueof) {
   }
 
   if (m > 1) return sum / (m - 1);
-};
+}
 
-var deviation = function(array, f) {
+function deviation(array, f) {
   var v = variance(array, f);
   return v ? Math.sqrt(v) : v;
-};
+}
 
-var extent = function(values, valueof) {
+function extent(values, valueof) {
   var n = values.length,
       i = -1,
       value,
@@ -159,24 +159,24 @@ var extent = function(values, valueof) {
   }
 
   return [min, max];
-};
+}
 
 var array = Array.prototype;
 
 var slice = array.slice;
 var map = array.map;
 
-var constant = function(x) {
+function constant(x) {
   return function() {
     return x;
   };
-};
+}
 
-var identity = function(x) {
+function identity(x) {
   return x;
-};
+}
 
-var sequence = function(start, stop, step) {
+function sequence(start, stop, step) {
   start = +start, stop = +stop, step = (n = arguments.length) < 2 ? (stop = start, start = 0, 1) : n < 3 ? 1 : +step;
 
   var i = -1,
@@ -188,13 +188,13 @@ var sequence = function(start, stop, step) {
   }
 
   return range;
-};
+}
 
-var e10 = Math.sqrt(50);
-var e5 = Math.sqrt(10);
-var e2 = Math.sqrt(2);
+var e10 = Math.sqrt(50),
+    e5 = Math.sqrt(10),
+    e2 = Math.sqrt(2);
 
-var ticks = function(start, stop, count) {
+function ticks(start, stop, count) {
   var reverse,
       i = -1,
       n,
@@ -221,7 +221,7 @@ var ticks = function(start, stop, count) {
   if (reverse) ticks.reverse();
 
   return ticks;
-};
+}
 
 function tickIncrement(start, stop, count) {
   var step = (stop - start) / Math.max(0, count),
@@ -242,14 +242,14 @@ function tickStep(start, stop, count) {
   return stop < start ? -step1 : step1;
 }
 
-var sturges = function(values) {
+function thresholdSturges(values) {
   return Math.ceil(Math.log(values.length) / Math.LN2) + 1;
-};
+}
 
-var histogram = function() {
+function histogram() {
   var value = identity,
       domain = extent,
-      threshold = sturges;
+      threshold = thresholdSturges;
 
   function histogram(data) {
     var i,
@@ -269,7 +269,7 @@ var histogram = function() {
     // Convert number of thresholds into uniform thresholds.
     if (!Array.isArray(tz)) {
       tz = tickStep(x0, x1, tz);
-      tz = sequence(Math.ceil(x0 / tz) * tz, Math.floor(x1 / tz) * tz, tz); // exclusive
+      tz = sequence(Math.ceil(x0 / tz) * tz, x1, tz); // exclusive
     }
 
     // Remove any thresholds outside the domain.
@@ -311,9 +311,9 @@ var histogram = function() {
   };
 
   return histogram;
-};
+}
 
-var threshold = function(values, p, valueof) {
+function threshold(values, p, valueof) {
   if (valueof == null) valueof = number;
   if (!(n = values.length)) return;
   if ((p = +p) <= 0 || n < 2) return +valueof(values[0], 0, values);
@@ -324,18 +324,18 @@ var threshold = function(values, p, valueof) {
       value0 = +valueof(values[i0], i0, values),
       value1 = +valueof(values[i0 + 1], i0 + 1, values);
   return value0 + (value1 - value0) * (i - i0);
-};
+}
 
-var freedmanDiaconis = function(values, min, max) {
+function freedmanDiaconis(values, min, max) {
   values = map.call(values, number).sort(ascending);
   return Math.ceil((max - min) / (2 * (threshold(values, 0.75) - threshold(values, 0.25)) * Math.pow(values.length, -1 / 3)));
-};
+}
 
-var scott = function(values, min, max) {
+function scott(values, min, max) {
   return Math.ceil((max - min) / (3.5 * deviation(values) * Math.pow(values.length, -1 / 3)));
-};
+}
 
-var max = function(values, valueof) {
+function max(values, valueof) {
   var n = values.length,
       i = -1,
       value,
@@ -368,9 +368,9 @@ var max = function(values, valueof) {
   }
 
   return max;
-};
+}
 
-var mean = function(values, valueof) {
+function mean(values, valueof) {
   var n = values.length,
       m = n,
       i = -1,
@@ -392,9 +392,9 @@ var mean = function(values, valueof) {
   }
 
   if (m) return sum / m;
-};
+}
 
-var median = function(values, valueof) {
+function median(values, valueof) {
   var n = values.length,
       i = -1,
       value,
@@ -417,9 +417,9 @@ var median = function(values, valueof) {
   }
 
   return threshold(numbers.sort(ascending), 0.5);
-};
+}
 
-var merge = function(arrays) {
+function merge(arrays) {
   var n = arrays.length,
       m,
       i = -1,
@@ -439,9 +439,9 @@ var merge = function(arrays) {
   }
 
   return merged;
-};
+}
 
-var min = function(values, valueof) {
+function min(values, valueof) {
   var n = values.length,
       i = -1,
       value,
@@ -474,15 +474,15 @@ var min = function(values, valueof) {
   }
 
   return min;
-};
+}
 
-var permute = function(array, indexes) {
+function permute(array, indexes) {
   var i = indexes.length, permutes = new Array(i);
   while (i--) permutes[i] = array[indexes[i]];
   return permutes;
-};
+}
 
-var scan = function(values, compare) {
+function scan(values, compare) {
   if (!(n = values.length)) return;
   var n,
       i = 0,
@@ -499,9 +499,9 @@ var scan = function(values, compare) {
   }
 
   if (compare(xj, xj) === 0) return j;
-};
+}
 
-var shuffle = function(array, i0, i1) {
+function shuffle(array, i0, i1) {
   var m = (i1 == null ? array.length : i1) - (i0 = i0 == null ? 0 : +i0),
       t,
       i;
@@ -514,9 +514,9 @@ var shuffle = function(array, i0, i1) {
   }
 
   return array;
-};
+}
 
-var sum = function(values, valueof) {
+function sum(values, valueof) {
   var n = values.length,
       i = -1,
       value,
@@ -535,9 +535,9 @@ var sum = function(values, valueof) {
   }
 
   return sum;
-};
+}
 
-var transpose = function(matrix) {
+function transpose(matrix) {
   if (!(n = matrix.length)) return [];
   for (var i = -1, m = min(matrix, length), transpose = new Array(m); ++i < m;) {
     for (var j = -1, n, row = transpose[i] = new Array(n); ++j < n;) {
@@ -545,27 +545,27 @@ var transpose = function(matrix) {
     }
   }
   return transpose;
-};
+}
 
 function length(d) {
   return d.length;
 }
 
-var zip = function() {
+function zip() {
   return transpose(arguments);
-};
+}
 
 var slice$1 = Array.prototype.slice;
 
-var identity$1 = function(x) {
+function identity$1(x) {
   return x;
-};
+}
 
-var top = 1;
-var right = 2;
-var bottom = 3;
-var left = 4;
-var epsilon = 1e-6;
+var top = 1,
+    right = 2,
+    bottom = 3,
+    left = 4,
+    epsilon = 1e-6;
 
 function translateX(x) {
   return "translate(" + (x + 0.5) + ",0)";
@@ -622,16 +622,16 @@ function axis(orient, scale) {
 
     path = path.merge(path.enter().insert("path", ".tick")
         .attr("class", "domain")
-        .attr("stroke", "#000"));
+        .attr("stroke", "currentColor"));
 
     tick = tick.merge(tickEnter);
 
     line = line.merge(tickEnter.append("line")
-        .attr("stroke", "#000")
+        .attr("stroke", "currentColor")
         .attr(x + "2", k * tickSizeInner));
 
     text = text.merge(tickEnter.append("text")
-        .attr("fill", "#000")
+        .attr("fill", "currentColor")
         .attr(x, k * spacing)
         .attr("dy", orient === top ? "0em" : orient === bottom ? "0.71em" : "0.32em"));
 
@@ -654,8 +654,8 @@ function axis(orient, scale) {
 
     path
         .attr("d", orient === left || orient == right
-            ? "M" + k * tickSizeOuter + "," + range0 + "H0.5V" + range1 + "H" + k * tickSizeOuter
-            : "M" + range0 + "," + k * tickSizeOuter + "V0.5H" + range1 + "V" + k * tickSizeOuter);
+            ? (tickSizeOuter ? "M" + k * tickSizeOuter + "," + range0 + "H0.5V" + range1 + "H" + k * tickSizeOuter : "M0.5," + range0 + "V" + range1)
+            : (tickSizeOuter ? "M" + range0 + "," + k * tickSizeOuter + "V0.5H" + range1 + "V" + k * tickSizeOuter : "M" + range0 + ",0.5H" + range1));
 
     tick
         .attr("opacity", 1)
@@ -826,11 +826,11 @@ var namespaces = {
   xmlns: "http://www.w3.org/2000/xmlns/"
 };
 
-var namespace = function(name) {
+function namespace(name) {
   var prefix = name += "", i = prefix.indexOf(":");
   if (i >= 0 && (prefix = name.slice(0, i)) !== "xmlns") name = name.slice(i + 1);
   return namespaces.hasOwnProperty(prefix) ? {space: namespaces[prefix], local: name} : name;
-};
+}
 
 function creatorInherit(name) {
   return function() {
@@ -848,207 +848,22 @@ function creatorFixed(fullname) {
   };
 }
 
-var creator = function(name) {
+function creator(name) {
   var fullname = namespace(name);
   return (fullname.local
       ? creatorFixed
       : creatorInherit)(fullname);
-};
-
-var nextId = 0;
-
-function local$1() {
-  return new Local;
-}
-
-function Local() {
-  this._ = "@" + (++nextId).toString(36);
-}
-
-Local.prototype = local$1.prototype = {
-  constructor: Local,
-  get: function(node) {
-    var id = this._;
-    while (!(id in node)) if (!(node = node.parentNode)) return;
-    return node[id];
-  },
-  set: function(node, value) {
-    return node[this._] = value;
-  },
-  remove: function(node) {
-    return this._ in node && delete node[this._];
-  },
-  toString: function() {
-    return this._;
-  }
-};
-
-var matcher = function(selector) {
-  return function() {
-    return this.matches(selector);
-  };
-};
-
-if (typeof document !== "undefined") {
-  var element = document.documentElement;
-  if (!element.matches) {
-    var vendorMatches = element.webkitMatchesSelector
-        || element.msMatchesSelector
-        || element.mozMatchesSelector
-        || element.oMatchesSelector;
-    matcher = function(selector) {
-      return function() {
-        return vendorMatches.call(this, selector);
-      };
-    };
-  }
-}
-
-var matcher$1 = matcher;
-
-var filterEvents = {};
-
-exports.event = null;
-
-if (typeof document !== "undefined") {
-  var element$1 = document.documentElement;
-  if (!("onmouseenter" in element$1)) {
-    filterEvents = {mouseenter: "mouseover", mouseleave: "mouseout"};
-  }
-}
-
-function filterContextListener(listener, index, group) {
-  listener = contextListener(listener, index, group);
-  return function(event) {
-    var related = event.relatedTarget;
-    if (!related || (related !== this && !(related.compareDocumentPosition(this) & 8))) {
-      listener.call(this, event);
-    }
-  };
-}
-
-function contextListener(listener, index, group) {
-  return function(event1) {
-    var event0 = exports.event; // Events can be reentrant (e.g., focus).
-    exports.event = event1;
-    try {
-      listener.call(this, this.__data__, index, group);
-    } finally {
-      exports.event = event0;
-    }
-  };
-}
-
-function parseTypenames$1(typenames) {
-  return typenames.trim().split(/^|\s+/).map(function(t) {
-    var name = "", i = t.indexOf(".");
-    if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);
-    return {type: t, name: name};
-  });
-}
-
-function onRemove(typename) {
-  return function() {
-    var on = this.__on;
-    if (!on) return;
-    for (var j = 0, i = -1, m = on.length, o; j < m; ++j) {
-      if (o = on[j], (!typename.type || o.type === typename.type) && o.name === typename.name) {
-        this.removeEventListener(o.type, o.listener, o.capture);
-      } else {
-        on[++i] = o;
-      }
-    }
-    if (++i) on.length = i;
-    else delete this.__on;
-  };
-}
-
-function onAdd(typename, value, capture) {
-  var wrap = filterEvents.hasOwnProperty(typename.type) ? filterContextListener : contextListener;
-  return function(d, i, group) {
-    var on = this.__on, o, listener = wrap(value, i, group);
-    if (on) for (var j = 0, m = on.length; j < m; ++j) {
-      if ((o = on[j]).type === typename.type && o.name === typename.name) {
-        this.removeEventListener(o.type, o.listener, o.capture);
-        this.addEventListener(o.type, o.listener = listener, o.capture = capture);
-        o.value = value;
-        return;
-      }
-    }
-    this.addEventListener(typename.type, listener, capture);
-    o = {type: typename.type, name: typename.name, value: value, listener: listener, capture: capture};
-    if (!on) this.__on = [o];
-    else on.push(o);
-  };
 }
 
-var selection_on = function(typename, value, capture) {
-  var typenames = parseTypenames$1(typename + ""), i, n = typenames.length, t;
-
-  if (arguments.length < 2) {
-    var on = this.node().__on;
-    if (on) for (var j = 0, m = on.length, o; j < m; ++j) {
-      for (i = 0, o = on[j]; i < n; ++i) {
-        if ((t = typenames[i]).type === o.type && t.name === o.name) {
-          return o.value;
-        }
-      }
-    }
-    return;
-  }
-
-  on = value ? onAdd : onRemove;
-  if (capture == null) capture = false;
-  for (i = 0; i < n; ++i) this.each(on(typenames[i], value, capture));
-  return this;
-};
-
-function customEvent(event1, listener, that, args) {
-  var event0 = exports.event;
-  event1.sourceEvent = exports.event;
-  exports.event = event1;
-  try {
-    return listener.apply(that, args);
-  } finally {
-    exports.event = event0;
-  }
-}
-
-var sourceEvent = function() {
-  var current = exports.event, source;
-  while (source = current.sourceEvent) current = source;
-  return current;
-};
-
-var point = function(node, event) {
-  var svg = node.ownerSVGElement || node;
-
-  if (svg.createSVGPoint) {
-    var point = svg.createSVGPoint();
-    point.x = event.clientX, point.y = event.clientY;
-    point = point.matrixTransform(node.getScreenCTM().inverse());
-    return [point.x, point.y];
-  }
-
-  var rect = node.getBoundingClientRect();
-  return [event.clientX - rect.left - node.clientLeft, event.clientY - rect.top - node.clientTop];
-};
-
-var mouse = function(node) {
-  var event = sourceEvent();
-  if (event.changedTouches) event = event.changedTouches[0];
-  return point(node, event);
-};
-
 function none() {}
 
-var selector = function(selector) {
+function selector(selector) {
   return selector == null ? none : function() {
     return this.querySelector(selector);
   };
-};
+}
 
-var selection_select = function(select) {
+function selection_select(select) {
   if (typeof select !== "function") select = selector(select);
 
   for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
@@ -1061,19 +876,19 @@ var selection_select = function(select) {
   }
 
   return new Selection(subgroups, this._parents);
-};
+}
 
-function empty$1() {
+function empty() {
   return [];
 }
 
-var selectorAll = function(selector) {
-  return selector == null ? empty$1 : function() {
+function selectorAll(selector) {
+  return selector == null ? empty : function() {
     return this.querySelectorAll(selector);
   };
-};
+}
 
-var selection_selectAll = function(select) {
+function selection_selectAll(select) {
   if (typeof select !== "function") select = selectorAll(select);
 
   for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
@@ -1086,9 +901,32 @@ var selection_selectAll = function(select) {
   }
 
   return new Selection(subgroups, parents);
+}
+
+var matcher = function(selector) {
+  return function() {
+    return this.matches(selector);
+  };
 };
 
-var selection_filter = function(match) {
+if (typeof document !== "undefined") {
+  var element = document.documentElement;
+  if (!element.matches) {
+    var vendorMatches = element.webkitMatchesSelector
+        || element.msMatchesSelector
+        || element.mozMatchesSelector
+        || element.oMatchesSelector;
+    matcher = function(selector) {
+      return function() {
+        return vendorMatches.call(this, selector);
+      };
+    };
+  }
+}
+
+var matcher$1 = matcher;
+
+function selection_filter(match) {
   if (typeof match !== "function") match = matcher$1(match);
 
   for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
@@ -1100,15 +938,15 @@ var selection_filter = function(match) {
   }
 
   return new Selection(subgroups, this._parents);
-};
+}
 
-var sparse = function(update) {
+function sparse(update) {
   return new Array(update.length);
-};
+}
 
-var selection_enter = function() {
+function selection_enter() {
   return new Selection(this._enter || this._groups.map(sparse), this._parents);
-};
+}
 
 function EnterNode(parent, datum) {
   this.ownerDocument = parent.ownerDocument;
@@ -1126,11 +964,11 @@ EnterNode.prototype = {
   querySelectorAll: function(selector) { return this._parent.querySelectorAll(selector); }
 };
 
-var constant$1 = function(x) {
+function constant$1(x) {
   return function() {
     return x;
   };
-};
+}
 
 var keyPrefix = "$"; // Protect against keys like “__proto__”.
 
@@ -1204,7 +1042,7 @@ function bindKey(parent, group, enter, update, exit, data, key) {
   }
 }
 
-var selection_data = function(value, key) {
+function selection_data(value, key) {
   if (!value) {
     data = new Array(this.size()), j = -1;
     this.each(function(d) { data[++j] = d; });
@@ -1245,13 +1083,13 @@ var selection_data = function(value, key) {
   update._enter = enter;
   update._exit = exit;
   return update;
-};
+}
 
-var selection_exit = function() {
+function selection_exit() {
   return new Selection(this._exit || this._groups.map(sparse), this._parents);
-};
+}
 
-var selection_merge = function(selection$$1) {
+function selection_merge(selection$$1) {
 
   for (var groups0 = this._groups, groups1 = selection$$1._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
     for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
@@ -1266,9 +1104,9 @@ var selection_merge = function(selection$$1) {
   }
 
   return new Selection(merges, this._parents);
-};
+}
 
-var selection_order = function() {
+function selection_order() {
 
   for (var groups = this._groups, j = -1, m = groups.length; ++j < m;) {
     for (var group = groups[j], i = group.length - 1, next = group[i], node; --i >= 0;) {
@@ -1280,9 +1118,9 @@ var selection_order = function() {
   }
 
   return this;
-};
+}
 
-var selection_sort = function(compare) {
+function selection_sort(compare) {
   if (!compare) compare = ascending$1;
 
   function compareNode(a, b) {
@@ -1299,26 +1137,26 @@ var selection_sort = function(compare) {
   }
 
   return new Selection(sortgroups, this._parents).order();
-};
+}
 
 function ascending$1(a, b) {
   return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
 }
 
-var selection_call = function() {
+function selection_call() {
   var callback = arguments[0];
   arguments[0] = this;
   callback.apply(null, arguments);
   return this;
-};
+}
 
-var selection_nodes = function() {
+function selection_nodes() {
   var nodes = new Array(this.size()), i = -1;
   this.each(function() { nodes[++i] = this; });
   return nodes;
-};
+}
 
-var selection_node = function() {
+function selection_node() {
 
   for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
     for (var group = groups[j], i = 0, n = group.length; i < n; ++i) {
@@ -1328,19 +1166,19 @@ var selection_node = function() {
   }
 
   return null;
-};
+}
 
-var selection_size = function() {
+function selection_size() {
   var size = 0;
   this.each(function() { ++size; });
   return size;
-};
+}
 
-var selection_empty = function() {
+function selection_empty() {
   return !this.node();
-};
+}
 
-var selection_each = function(callback) {
+function selection_each(callback) {
 
   for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
     for (var group = groups[j], i = 0, n = group.length, node; i < n; ++i) {
@@ -1349,7 +1187,7 @@ var selection_each = function(callback) {
   }
 
   return this;
-};
+}
 
 function attrRemove(name) {
   return function() {
@@ -1391,7 +1229,7 @@ function attrFunctionNS(fullname, value) {
   };
 }
 
-var selection_attr = function(name, value) {
+function selection_attr(name, value) {
   var fullname = namespace(name);
 
   if (arguments.length < 2) {
@@ -1405,13 +1243,13 @@ var selection_attr = function(name, value) {
       ? (fullname.local ? attrRemoveNS : attrRemove) : (typeof value === "function"
       ? (fullname.local ? attrFunctionNS : attrFunction)
       : (fullname.local ? attrConstantNS : attrConstant)))(fullname, value));
-};
+}
 
-var defaultView = function(node) {
+function defaultView(node) {
   return (node.ownerDocument && node.ownerDocument.defaultView) // node is a Node
       || (node.document && node) // node is a Window
       || node.defaultView; // node is a Document
-};
+}
 
 function styleRemove(name) {
   return function() {
@@ -1433,14 +1271,14 @@ function styleFunction(name, value, priority) {
   };
 }
 
-var selection_style = function(name, value, priority) {
+function selection_style(name, value, priority) {
   return arguments.length > 1
       ? this.each((value == null
             ? styleRemove : typeof value === "function"
             ? styleFunction
             : styleConstant)(name, value, priority == null ? "" : priority))
       : styleValue(this.node(), name);
-};
+}
 
 function styleValue(node, name) {
   return node.style.getPropertyValue(name)
@@ -1467,14 +1305,14 @@ function propertyFunction(name, value) {
   };
 }
 
-var selection_property = function(name, value) {
+function selection_property(name, value) {
   return arguments.length > 1
       ? this.each((value == null
           ? propertyRemove : typeof value === "function"
           ? propertyFunction
           : propertyConstant)(name, value))
       : this.node()[name];
-};
+}
 
 function classArray(string) {
   return string.trim().split(/^|\s+/);
@@ -1537,7 +1375,7 @@ function classedFunction(names, value) {
   };
 }
 
-var selection_classed = function(name, value) {
+function selection_classed(name, value) {
   var names = classArray(name + "");
 
   if (arguments.length < 2) {
@@ -1550,7 +1388,7 @@ var selection_classed = function(name, value) {
       ? classedFunction : value
       ? classedTrue
       : classedFalse)(names, value));
-};
+}
 
 function textRemove() {
   this.textContent = "";
@@ -1569,14 +1407,14 @@ function textFunction(value) {
   };
 }
 
-var selection_text = function(value) {
+function selection_text(value) {
   return arguments.length
       ? this.each(value == null
           ? textRemove : (typeof value === "function"
           ? textFunction
           : textConstant)(value))
       : this.node().textContent;
-};
+}
 
 function htmlRemove() {
   this.innerHTML = "";
@@ -1595,64 +1433,184 @@ function htmlFunction(value) {
   };
 }
 
-var selection_html = function(value) {
+function selection_html(value) {
   return arguments.length
       ? this.each(value == null
           ? htmlRemove : (typeof value === "function"
           ? htmlFunction
           : htmlConstant)(value))
       : this.node().innerHTML;
-};
+}
 
 function raise() {
   if (this.nextSibling) this.parentNode.appendChild(this);
 }
 
-var selection_raise = function() {
+function selection_raise() {
   return this.each(raise);
-};
+}
 
 function lower() {
   if (this.previousSibling) this.parentNode.insertBefore(this, this.parentNode.firstChild);
 }
 
-var selection_lower = function() {
+function selection_lower() {
   return this.each(lower);
-};
+}
 
-var selection_append = function(name) {
+function selection_append(name) {
   var create = typeof name === "function" ? name : creator(name);
   return this.select(function() {
     return this.appendChild(create.apply(this, arguments));
   });
-};
+}
 
 function constantNull() {
   return null;
 }
 
-var selection_insert = function(name, before) {
+function selection_insert(name, before) {
   var create = typeof name === "function" ? name : creator(name),
       select = before == null ? constantNull : typeof before === "function" ? before : selector(before);
   return this.select(function() {
     return this.insertBefore(create.apply(this, arguments), select.apply(this, arguments) || null);
   });
-};
+}
 
 function remove() {
   var parent = this.parentNode;
   if (parent) parent.removeChild(this);
 }
 
-var selection_remove = function() {
+function selection_remove() {
   return this.each(remove);
-};
+}
+
+function selection_cloneShallow() {
+  return this.parentNode.insertBefore(this.cloneNode(false), this.nextSibling);
+}
 
-var selection_datum = function(value) {
+function selection_cloneDeep() {
+  return this.parentNode.insertBefore(this.cloneNode(true), this.nextSibling);
+}
+
+function selection_clone(deep) {
+  return this.select(deep ? selection_cloneDeep : selection_cloneShallow);
+}
+
+function selection_datum(value) {
   return arguments.length
       ? this.property("__data__", value)
       : this.node().__data__;
-};
+}
+
+var filterEvents = {};
+
+exports.event = null;
+
+if (typeof document !== "undefined") {
+  var element$1 = document.documentElement;
+  if (!("onmouseenter" in element$1)) {
+    filterEvents = {mouseenter: "mouseover", mouseleave: "mouseout"};
+  }
+}
+
+function filterContextListener(listener, index, group) {
+  listener = contextListener(listener, index, group);
+  return function(event) {
+    var related = event.relatedTarget;
+    if (!related || (related !== this && !(related.compareDocumentPosition(this) & 8))) {
+      listener.call(this, event);
+    }
+  };
+}
+
+function contextListener(listener, index, group) {
+  return function(event1) {
+    var event0 = exports.event; // Events can be reentrant (e.g., focus).
+    exports.event = event1;
+    try {
+      listener.call(this, this.__data__, index, group);
+    } finally {
+      exports.event = event0;
+    }
+  };
+}
+
+function parseTypenames$1(typenames) {
+  return typenames.trim().split(/^|\s+/).map(function(t) {
+    var name = "", i = t.indexOf(".");
+    if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);
+    return {type: t, name: name};
+  });
+}
+
+function onRemove(typename) {
+  return function() {
+    var on = this.__on;
+    if (!on) return;
+    for (var j = 0, i = -1, m = on.length, o; j < m; ++j) {
+      if (o = on[j], (!typename.type || o.type === typename.type) && o.name === typename.name) {
+        this.removeEventListener(o.type, o.listener, o.capture);
+      } else {
+        on[++i] = o;
+      }
+    }
+    if (++i) on.length = i;
+    else delete this.__on;
+  };
+}
+
+function onAdd(typename, value, capture) {
+  var wrap = filterEvents.hasOwnProperty(typename.type) ? filterContextListener : contextListener;
+  return function(d, i, group) {
+    var on = this.__on, o, listener = wrap(value, i, group);
+    if (on) for (var j = 0, m = on.length; j < m; ++j) {
+      if ((o = on[j]).type === typename.type && o.name === typename.name) {
+        this.removeEventListener(o.type, o.listener, o.capture);
+        this.addEventListener(o.type, o.listener = listener, o.capture = capture);
+        o.value = value;
+        return;
+      }
+    }
+    this.addEventListener(typename.type, listener, capture);
+    o = {type: typename.type, name: typename.name, value: value, listener: listener, capture: capture};
+    if (!on) this.__on = [o];
+    else on.push(o);
+  };
+}
+
+function selection_on(typename, value, capture) {
+  var typenames = parseTypenames$1(typename + ""), i, n = typenames.length, t;
+
+  if (arguments.length < 2) {
+    var on = this.node().__on;
+    if (on) for (var j = 0, m = on.length, o; j < m; ++j) {
+      for (i = 0, o = on[j]; i < n; ++i) {
+        if ((t = typenames[i]).type === o.type && t.name === o.name) {
+          return o.value;
+        }
+      }
+    }
+    return;
+  }
+
+  on = value ? onAdd : onRemove;
+  if (capture == null) capture = false;
+  for (i = 0; i < n; ++i) this.each(on(typenames[i], value, capture));
+  return this;
+}
+
+function customEvent(event1, listener, that, args) {
+  var event0 = exports.event;
+  event1.sourceEvent = exports.event;
+  exports.event = event1;
+  try {
+    return listener.apply(that, args);
+  } finally {
+    exports.event = event0;
+  }
+}
 
 function dispatchEvent(node, type, params) {
   var window = defaultView(node),
@@ -1681,11 +1639,11 @@ function dispatchFunction(type, params) {
   };
 }
 
-var selection_dispatch = function(type, params) {
+function selection_dispatch(type, params) {
   return this.each((typeof params === "function"
       ? dispatchFunction
       : dispatchConstant)(type, params));
-};
+}
 
 var root = [null];
 
@@ -1726,24 +1684,83 @@ Selection.prototype = selection.prototype = {
   append: selection_append,
   insert: selection_insert,
   remove: selection_remove,
+  clone: selection_clone,
   datum: selection_datum,
   on: selection_on,
   dispatch: selection_dispatch
 };
 
-var select = function(selector) {
+function select(selector) {
   return typeof selector === "string"
       ? new Selection([[document.querySelector(selector)]], [document.documentElement])
       : new Selection([[selector]], root);
+}
+
+function create(name) {
+  return select(creator(name).call(document.documentElement));
+}
+
+var nextId = 0;
+
+function local() {
+  return new Local;
+}
+
+function Local() {
+  this._ = "@" + (++nextId).toString(36);
+}
+
+Local.prototype = local.prototype = {
+  constructor: Local,
+  get: function(node) {
+    var id = this._;
+    while (!(id in node)) if (!(node = node.parentNode)) return;
+    return node[id];
+  },
+  set: function(node, value) {
+    return node[this._] = value;
+  },
+  remove: function(node) {
+    return this._ in node && delete node[this._];
+  },
+  toString: function() {
+    return this._;
+  }
 };
 
-var selectAll = function(selector) {
+function sourceEvent() {
+  var current = exports.event, source;
+  while (source = current.sourceEvent) current = source;
+  return current;
+}
+
+function point(node, event) {
+  var svg = node.ownerSVGElement || node;
+
+  if (svg.createSVGPoint) {
+    var point = svg.createSVGPoint();
+    point.x = event.clientX, point.y = event.clientY;
+    point = point.matrixTransform(node.getScreenCTM().inverse());
+    return [point.x, point.y];
+  }
+
+  var rect = node.getBoundingClientRect();
+  return [event.clientX - rect.left - node.clientLeft, event.clientY - rect.top - node.clientTop];
+}
+
+function mouse(node) {
+  var event = sourceEvent();
+  if (event.changedTouches) event = event.changedTouches[0];
+  return point(node, event);
+}
+
+function selectAll(selector) {
   return typeof selector === "string"
       ? new Selection([document.querySelectorAll(selector)], [document.documentElement])
       : new Selection([selector == null ? [] : selector], root);
-};
+}
 
-var touch = function(node, touches, identifier) {
+function touch(node, touches, identifier) {
   if (arguments.length < 3) identifier = touches, touches = sourceEvent().changedTouches;
 
   for (var i = 0, n = touches ? touches.length : 0, touch; i < n; ++i) {
@@ -1753,9 +1770,9 @@ var touch = function(node, touches, identifier) {
   }
 
   return null;
-};
+}
 
-var touches = function(node, touches) {
+function touches(node, touches) {
   if (touches == null) touches = sourceEvent().touches;
 
   for (var i = 0, n = touches ? touches.length : 0, points = new Array(n); i < n; ++i) {
@@ -1763,48 +1780,48 @@ var touches = function(node, touches) {
   }
 
   return points;
-};
+}
 
 function nopropagation() {
   exports.event.stopImmediatePropagation();
 }
 
-var noevent = function() {
+function noevent() {
   exports.event.preventDefault();
   exports.event.stopImmediatePropagation();
-};
+}
 
-var dragDisable = function(view) {
+function dragDisable(view) {
   var root = view.document.documentElement,
-      selection = select(view).on("dragstart.drag", noevent, true);
+      selection$$1 = select(view).on("dragstart.drag", noevent, true);
   if ("onselectstart" in root) {
-    selection.on("selectstart.drag", noevent, true);
+    selection$$1.on("selectstart.drag", noevent, true);
   } else {
     root.__noselect = root.style.MozUserSelect;
     root.style.MozUserSelect = "none";
   }
-};
+}
 
 function yesdrag(view, noclick) {
   var root = view.document.documentElement,
-      selection = select(view).on("dragstart.drag", null);
+      selection$$1 = select(view).on("dragstart.drag", null);
   if (noclick) {
-    selection.on("click.drag", noevent, true);
-    setTimeout(function() { selection.on("click.drag", null); }, 0);
+    selection$$1.on("click.drag", noevent, true);
+    setTimeout(function() { selection$$1.on("click.drag", null); }, 0);
   }
   if ("onselectstart" in root) {
-    selection.on("selectstart.drag", null);
+    selection$$1.on("selectstart.drag", null);
   } else {
     root.style.MozUserSelect = root.__noselect;
     delete root.__noselect;
   }
 }
 
-var constant$2 = function(x) {
+function constant$2(x) {
   return function() {
     return x;
   };
-};
+}
 
 function DragEvent(target, type, subject, id, active, x, y, dx, dy, dispatch) {
   this.target = target;
@@ -1825,7 +1842,7 @@ DragEvent.prototype.on = function() {
 };
 
 // Ignore right-click, since that should open the context menu.
-function defaultFilter$1() {
+function defaultFilter() {
   return !exports.event.button;
 }
 
@@ -1841,8 +1858,8 @@ function defaultTouchable() {
   return "ontouchstart" in this;
 }
 
-var drag = function() {
-  var filter = defaultFilter$1,
+function drag() {
+  var filter = defaultFilter,
       container = defaultContainer,
       subject = defaultSubject,
       touchable = defaultTouchable,
@@ -1855,8 +1872,8 @@ var drag = function() {
       touchending,
       clickDistance2 = 0;
 
-  function drag(selection) {
-    selection
+  function drag(selection$$1) {
+    selection$$1
         .on("mousedown.drag", mousedowned)
       .filter(touchable)
         .on("touchstart.drag", touchstarted)
@@ -1897,12 +1914,12 @@ var drag = function() {
 
   function touchstarted() {
     if (!filter.apply(this, arguments)) return;
-    var touches = exports.event.changedTouches,
+    var touches$$1 = exports.event.changedTouches,
         c = container.apply(this, arguments),
-        n = touches.length, i, gesture;
+        n = touches$$1.length, i, gesture;
 
     for (i = 0; i < n; ++i) {
-      if (gesture = beforestart(touches[i].identifier, c, touch, this, arguments)) {
+      if (gesture = beforestart(touches$$1[i].identifier, c, touch, this, arguments)) {
         nopropagation();
         gesture("start");
       }
@@ -1910,11 +1927,11 @@ var drag = function() {
   }
 
   function touchmoved() {
-    var touches = exports.event.changedTouches,
-        n = touches.length, i, gesture;
+    var touches$$1 = exports.event.changedTouches,
+        n = touches$$1.length, i, gesture;
 
     for (i = 0; i < n; ++i) {
-      if (gesture = gestures[touches[i].identifier]) {
+      if (gesture = gestures[touches$$1[i].identifier]) {
         noevent();
         gesture("drag");
       }
@@ -1922,21 +1939,21 @@ var drag = function() {
   }
 
   function touchended() {
-    var touches = exports.event.changedTouches,
-        n = touches.length, i, gesture;
+    var touches$$1 = exports.event.changedTouches,
+        n = touches$$1.length, i, gesture;
 
     if (touchending) clearTimeout(touchending);
     touchending = setTimeout(function() { touchending = null; }, 500); // Ghost clicks are delayed!
     for (i = 0; i < n; ++i) {
-      if (gesture = gestures[touches[i].identifier]) {
+      if (gesture = gestures[touches$$1[i].identifier]) {
         nopropagation();
         gesture("end");
       }
     }
   }
 
-  function beforestart(id, container, point, that, args) {
-    var p = point(container, id), s, dx, dy,
+  function beforestart(id, container, point$$1, that, args) {
+    var p = point$$1(container, id), s, dx, dy,
         sublisteners = listeners.copy();
 
     if (!customEvent(new DragEvent(drag, "beforestart", s, id, active, p[0], p[1], 0, 0, sublisteners), function() {
@@ -1951,7 +1968,7 @@ var drag = function() {
       switch (type) {
         case "start": gestures[id] = gesture, n = active++; break;
         case "end": delete gestures[id], --active; // nobreak
-        case "drag": p = point(container, id), n = active; break;
+        case "drag": p = point$$1(container, id), n = active; break;
       }
       customEvent(new DragEvent(drag, type, s, id, n, p[0] + dx, p[1] + dy, p[0] - p0[0], p[1] - p0[1], sublisteners), sublisteners.apply, sublisteners, [type, that, args]);
     };
@@ -1983,12 +2000,12 @@ var drag = function() {
   };
 
   return drag;
-};
+}
 
-var define = function(constructor, factory, prototype) {
+function define(constructor, factory, prototype) {
   constructor.prototype = factory.prototype = prototype;
   prototype.constructor = constructor;
-};
+}
 
 function extend(parent, definition) {
   var prototype = Object.create(parent.prototype);
@@ -2001,17 +2018,17 @@ function Color() {}
 var darker = 0.7;
 var brighter = 1 / darker;
 
-var reI = "\\s*([+-]?\\d+)\\s*";
-var reN = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)\\s*";
-var reP = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)%\\s*";
-var reHex3 = /^#([0-9a-f]{3})$/;
-var reHex6 = /^#([0-9a-f]{6})$/;
-var reRgbInteger = new RegExp("^rgb\\(" + [reI, reI, reI] + "\\)$");
-var reRgbPercent = new RegExp("^rgb\\(" + [reP, reP, reP] + "\\)$");
-var reRgbaInteger = new RegExp("^rgba\\(" + [reI, reI, reI, reN] + "\\)$");
-var reRgbaPercent = new RegExp("^rgba\\(" + [reP, reP, reP, reN] + "\\)$");
-var reHslPercent = new RegExp("^hsl\\(" + [reN, reP, reP] + "\\)$");
-var reHslaPercent = new RegExp("^hsla\\(" + [reN, reP, reP, reN] + "\\)$");
+var reI = "\\s*([+-]?\\d+)\\s*",
+    reN = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)\\s*",
+    reP = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)%\\s*",
+    reHex3 = /^#([0-9a-f]{3})$/,
+    reHex6 = /^#([0-9a-f]{6})$/,
+    reRgbInteger = new RegExp("^rgb\\(" + [reI, reI, reI] + "\\)$"),
+    reRgbPercent = new RegExp("^rgb\\(" + [reP, reP, reP] + "\\)$"),
+    reRgbaInteger = new RegExp("^rgba\\(" + [reI, reI, reI, reN] + "\\)$"),
+    reRgbaPercent = new RegExp("^rgba\\(" + [reP, reP, reP, reN] + "\\)$"),
+    reHslPercent = new RegExp("^hsl\\(" + [reN, reP, reP] + "\\)$"),
+    reHslaPercent = new RegExp("^hsla\\(" + [reN, reP, reP, reN] + "\\)$");
 
 var named = {
   aliceblue: 0xf0f8ff,
@@ -2168,6 +2185,9 @@ define(Color, color, {
   displayable: function() {
     return this.rgb().displayable();
   },
+  hex: function() {
+    return this.rgb().hex();
+  },
   toString: function() {
     return this.rgb() + "";
   }
@@ -2234,6 +2254,9 @@ define(Rgb, rgb, extend(Color, {
         && (0 <= this.b && this.b <= 255)
         && (0 <= this.opacity && this.opacity <= 1);
   },
+  hex: function() {
+    return "#" + hex(this.r) + hex(this.g) + hex(this.b);
+  },
   toString: function() {
     var a = this.opacity; a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));
     return (a === 1 ? "rgb(" : "rgba(")
@@ -2244,6 +2267,11 @@ define(Rgb, rgb, extend(Color, {
   }
 }));
 
+function hex(value) {
+  value = Math.max(0, Math.min(255, Math.round(value) || 0));
+  return (value < 16 ? "0" : "") + value.toString(16);
+}
+
 function hsla(h, s, l, a) {
   if (a <= 0) h = s = l = NaN;
   else if (l <= 0 || l >= 1) h = s = NaN;
@@ -2328,31 +2356,39 @@ function hsl2rgb(h, m1, m2) {
 var deg2rad = Math.PI / 180;
 var rad2deg = 180 / Math.PI;
 
-var Kn = 18;
-var Xn = 0.950470;
-var Yn = 1;
-var Zn = 1.088830;
-var t0 = 4 / 29;
-var t1 = 6 / 29;
-var t2 = 3 * t1 * t1;
-var t3 = t1 * t1 * t1;
+// https://beta.observablehq.com/@mbostock/lab-and-rgb
+var K = 18,
+    Xn = 0.96422,
+    Yn = 1,
+    Zn = 0.82521,
+    t0 = 4 / 29,
+    t1 = 6 / 29,
+    t2 = 3 * t1 * t1,
+    t3 = t1 * t1 * t1;
 
 function labConvert(o) {
   if (o instanceof Lab) return new Lab(o.l, o.a, o.b, o.opacity);
   if (o instanceof Hcl) {
+    if (isNaN(o.h)) return new Lab(o.l, 0, 0, o.opacity);
     var h = o.h * deg2rad;
     return new Lab(o.l, Math.cos(h) * o.c, Math.sin(h) * o.c, o.opacity);
   }
   if (!(o instanceof Rgb)) o = rgbConvert(o);
-  var b = rgb2xyz(o.r),
-      a = rgb2xyz(o.g),
-      l = rgb2xyz(o.b),
-      x = xyz2lab((0.4124564 * b + 0.3575761 * a + 0.1804375 * l) / Xn),
-      y = xyz2lab((0.2126729 * b + 0.7151522 * a + 0.0721750 * l) / Yn),
-      z = xyz2lab((0.0193339 * b + 0.1191920 * a + 0.9503041 * l) / Zn);
+  var r = rgb2lrgb(o.r),
+      g = rgb2lrgb(o.g),
+      b = rgb2lrgb(o.b),
+      y = xyz2lab((0.2225045 * r + 0.7168786 * g + 0.0606169 * b) / Yn), x, z;
+  if (r === g && g === b) x = z = y; else {
+    x = xyz2lab((0.4360747 * r + 0.3850649 * g + 0.1430804 * b) / Xn);
+    z = xyz2lab((0.0139322 * r + 0.0971045 * g + 0.7141733 * b) / Zn);
+  }
   return new Lab(116 * y - 16, 500 * (x - y), 200 * (y - z), o.opacity);
 }
 
+function gray(l, opacity) {
+  return new Lab(l, 0, 0, opacity == null ? 1 : opacity);
+}
+
 function lab(l, a, b, opacity) {
   return arguments.length === 1 ? labConvert(l) : new Lab(l, a, b, opacity == null ? 1 : opacity);
 }
@@ -2366,22 +2402,22 @@ function Lab(l, a, b, opacity) {
 
 define(Lab, lab, extend(Color, {
   brighter: function(k) {
-    return new Lab(this.l + Kn * (k == null ? 1 : k), this.a, this.b, this.opacity);
+    return new Lab(this.l + K * (k == null ? 1 : k), this.a, this.b, this.opacity);
   },
   darker: function(k) {
-    return new Lab(this.l - Kn * (k == null ? 1 : k), this.a, this.b, this.opacity);
+    return new Lab(this.l - K * (k == null ? 1 : k), this.a, this.b, this.opacity);
   },
   rgb: function() {
     var y = (this.l + 16) / 116,
         x = isNaN(this.a) ? y : y + this.a / 500,
         z = isNaN(this.b) ? y : y - this.b / 200;
-    y = Yn * lab2xyz(y);
     x = Xn * lab2xyz(x);
+    y = Yn * lab2xyz(y);
     z = Zn * lab2xyz(z);
     return new Rgb(
-      xyz2rgb( 3.2404542 * x - 1.5371385 * y - 0.4985314 * z), // D65 -> sRGB
-      xyz2rgb(-0.9692660 * x + 1.8760108 * y + 0.0415560 * z),
-      xyz2rgb( 0.0556434 * x - 0.2040259 * y + 1.0572252 * z),
+      lrgb2rgb( 3.1338561 * x - 1.6168667 * y - 0.4906146 * z),
+      lrgb2rgb(-0.9787684 * x + 1.9161415 * y + 0.0334540 * z),
+      lrgb2rgb( 0.0719453 * x - 0.2289914 * y + 1.4052427 * z),
       this.opacity
     );
   }
@@ -2395,21 +2431,26 @@ function lab2xyz(t) {
   return t > t1 ? t * t * t : t2 * (t - t0);
 }
 
-function xyz2rgb(x) {
+function lrgb2rgb(x) {
   return 255 * (x <= 0.0031308 ? 12.92 * x : 1.055 * Math.pow(x, 1 / 2.4) - 0.055);
 }
 
-function rgb2xyz(x) {
+function rgb2lrgb(x) {
   return (x /= 255) <= 0.04045 ? x / 12.92 : Math.pow((x + 0.055) / 1.055, 2.4);
 }
 
 function hclConvert(o) {
   if (o instanceof Hcl) return new Hcl(o.h, o.c, o.l, o.opacity);
   if (!(o instanceof Lab)) o = labConvert(o);
+  if (o.a === 0 && o.b === 0) return new Hcl(NaN, 0, o.l, o.opacity);
   var h = Math.atan2(o.b, o.a) * rad2deg;
   return new Hcl(h < 0 ? h + 360 : h, Math.sqrt(o.a * o.a + o.b * o.b), o.l, o.opacity);
 }
 
+function lch(l, c, h, opacity) {
+  return arguments.length === 1 ? hclConvert(l) : new Hcl(h, c, l, opacity == null ? 1 : opacity);
+}
+
 function hcl(h, c, l, opacity) {
   return arguments.length === 1 ? hclConvert(h) : new Hcl(h, c, l, opacity == null ? 1 : opacity);
 }
@@ -2423,24 +2464,24 @@ function Hcl(h, c, l, opacity) {
 
 define(Hcl, hcl, extend(Color, {
   brighter: function(k) {
-    return new Hcl(this.h, this.c, this.l + Kn * (k == null ? 1 : k), this.opacity);
+    return new Hcl(this.h, this.c, this.l + K * (k == null ? 1 : k), this.opacity);
   },
   darker: function(k) {
-    return new Hcl(this.h, this.c, this.l - Kn * (k == null ? 1 : k), this.opacity);
+    return new Hcl(this.h, this.c, this.l - K * (k == null ? 1 : k), this.opacity);
   },
   rgb: function() {
     return labConvert(this).rgb();
   }
 }));
 
-var A = -0.14861;
-var B = +1.78277;
-var C = -0.29227;
-var D = -0.90649;
-var E = +1.97294;
-var ED = E * D;
-var EB = E * B;
-var BC_DA = B * C - D * A;
+var A = -0.14861,
+    B = +1.78277,
+    C = -0.29227,
+    D = -0.90649,
+    E = +1.97294,
+    ED = E * D,
+    EB = E * B,
+    BC_DA = B * C - D * A;
 
 function cubehelixConvert(o) {
   if (o instanceof Cubehelix) return new Cubehelix(o.h, o.s, o.l, o.opacity);
@@ -2499,7 +2540,7 @@ function basis(t1, v0, v1, v2, v3) {
       + t3 * v3) / 6;
 }
 
-var basis$1 = function(values) {
+function basis$1(values) {
   var n = values.length - 1;
   return function(t) {
     var i = t <= 0 ? (t = 0) : t >= 1 ? (t = 1, n - 1) : Math.floor(t * n),
@@ -2509,9 +2550,9 @@ var basis$1 = function(values) {
         v3 = i < n - 1 ? values[i + 2] : 2 * v2 - v1;
     return basis((t - i / n) * n, v0, v1, v2, v3);
   };
-};
+}
 
-var basisClosed = function(values) {
+function basisClosed(values) {
   var n = values.length;
   return function(t) {
     var i = Math.floor(((t %= 1) < 0 ? ++t : t) * n),
@@ -2521,13 +2562,13 @@ var basisClosed = function(values) {
         v3 = values[(i + 2) % n];
     return basis((t - i / n) * n, v0, v1, v2, v3);
   };
-};
+}
 
-var constant$3 = function(x) {
+function constant$3(x) {
   return function() {
     return x;
   };
-};
+}
 
 function linear(a, d) {
   return function(t) {
@@ -2608,7 +2649,7 @@ function rgbSpline(spline) {
 var rgbBasis = rgbSpline(basis$1);
 var rgbBasisClosed = rgbSpline(basisClosed);
 
-var array$1 = function(a, b) {
+function array$1(a, b) {
   var nb = b ? b.length : 0,
       na = a ? Math.min(nb, a.length) : 0,
       x = new Array(na),
@@ -2622,22 +2663,22 @@ var array$1 = function(a, b) {
     for (i = 0; i < na; ++i) c[i] = x[i](t);
     return c;
   };
-};
+}
 
-var date = function(a, b) {
+function date(a, b) {
   var d = new Date;
   return a = +a, b -= a, function(t) {
     return d.setTime(a + b * t), d;
   };
-};
+}
 
-var reinterpolate = function(a, b) {
+function interpolateNumber(a, b) {
   return a = +a, b -= a, function(t) {
     return a + b * t;
   };
-};
+}
 
-var object = function(a, b) {
+function object(a, b) {
   var i = {},
       c = {},
       k;
@@ -2657,10 +2698,10 @@ var object = function(a, b) {
     for (k in i) c[k] = i[k](t);
     return c;
   };
-};
+}
 
-var reA = /[-+]?(?:\d+\.?\d*|\.?\d+)(?:[eE][-+]?\d+)?/g;
-var reB = new RegExp(reA.source, "g");
+var reA = /[-+]?(?:\d+\.?\d*|\.?\d+)(?:[eE][-+]?\d+)?/g,
+    reB = new RegExp(reA.source, "g");
 
 function zero(b) {
   return function() {
@@ -2674,7 +2715,7 @@ function one(b) {
   };
 }
 
-var interpolateString = function(a, b) {
+function interpolateString(a, b) {
   var bi = reA.lastIndex = reB.lastIndex = 0, // scan index for next number in b
       am, // current match in a
       bm, // current match in b
@@ -2699,7 +2740,7 @@ var interpolateString = function(a, b) {
       else s[++i] = bm;
     } else { // interpolate non-matching numbers
       s[++i] = null;
-      q.push({i: i, x: reinterpolate(am, bm)});
+      q.push({i: i, x: interpolateNumber(am, bm)});
     }
     bi = reB.lastIndex;
   }
@@ -2720,25 +2761,40 @@ var interpolateString = function(a, b) {
           for (var i = 0, o; i < b; ++i) s[(o = q[i]).i] = o.x(t);
           return s.join("");
         });
-};
+}
 
-var interpolateValue = function(a, b) {
+function interpolateValue(a, b) {
   var t = typeof b, c;
   return b == null || t === "boolean" ? constant$3(b)
-      : (t === "number" ? reinterpolate
+      : (t === "number" ? interpolateNumber
       : t === "string" ? ((c = color(b)) ? (b = c, interpolateRgb) : interpolateString)
       : b instanceof color ? interpolateRgb
       : b instanceof Date ? date
       : Array.isArray(b) ? array$1
       : typeof b.valueOf !== "function" && typeof b.toString !== "function" || isNaN(b) ? object
-      : reinterpolate)(a, b);
-};
+      : interpolateNumber)(a, b);
+}
+
+function discrete(range) {
+  var n = range.length;
+  return function(t) {
+    return range[Math.max(0, Math.min(n - 1, Math.floor(t * n)))];
+  };
+}
+
+function hue$1(a, b) {
+  var i = hue(+a, +b);
+  return function(t) {
+    var x = i(t);
+    return x - 360 * Math.floor(x / 360);
+  };
+}
 
-var interpolateRound = function(a, b) {
+function interpolateRound(a, b) {
   return a = +a, b -= a, function(t) {
     return Math.round(a + b * t);
   };
-};
+}
 
 var degrees = 180 / Math.PI;
 
@@ -2751,7 +2807,7 @@ var identity$2 = {
   scaleY: 1
 };
 
-var decompose = function(a, b, c, d, e, f) {
+function decompose(a, b, c, d, e, f) {
   var scaleX, scaleY, skewX;
   if (scaleX = Math.sqrt(a * a + b * b)) a /= scaleX, b /= scaleX;
   if (skewX = a * c + b * d) c -= a * skewX, d -= b * skewX;
@@ -2765,12 +2821,12 @@ var decompose = function(a, b, c, d, e, f) {
     scaleX: scaleX,
     scaleY: scaleY
   };
-};
+}
 
-var cssNode;
-var cssRoot;
-var cssView;
-var svgNode;
+var cssNode,
+    cssRoot,
+    cssView,
+    svgNode;
 
 function parseCss(value) {
   if (value === "none") return identity$2;
@@ -2800,7 +2856,7 @@ function interpolateTransform(parse, pxComma, pxParen, degParen) {
   function translate(xa, ya, xb, yb, s, q) {
     if (xa !== xb || ya !== yb) {
       var i = s.push("translate(", null, pxComma, null, pxParen);
-      q.push({i: i - 4, x: reinterpolate(xa, xb)}, {i: i - 2, x: reinterpolate(ya, yb)});
+      q.push({i: i - 4, x: interpolateNumber(xa, xb)}, {i: i - 2, x: interpolateNumber(ya, yb)});
     } else if (xb || yb) {
       s.push("translate(" + xb + pxComma + yb + pxParen);
     }
@@ -2809,7 +2865,7 @@ function interpolateTransform(parse, pxComma, pxParen, degParen) {
   function rotate(a, b, s, q) {
     if (a !== b) {
       if (a - b > 180) b += 360; else if (b - a > 180) a += 360; // shortest path
-      q.push({i: s.push(pop(s) + "rotate(", null, degParen) - 2, x: reinterpolate(a, b)});
+      q.push({i: s.push(pop(s) + "rotate(", null, degParen) - 2, x: interpolateNumber(a, b)});
     } else if (b) {
       s.push(pop(s) + "rotate(" + b + degParen);
     }
@@ -2817,7 +2873,7 @@ function interpolateTransform(parse, pxComma, pxParen, degParen) {
 
   function skewX(a, b, s, q) {
     if (a !== b) {
-      q.push({i: s.push(pop(s) + "skewX(", null, degParen) - 2, x: reinterpolate(a, b)});
+      q.push({i: s.push(pop(s) + "skewX(", null, degParen) - 2, x: interpolateNumber(a, b)});
     } else if (b) {
       s.push(pop(s) + "skewX(" + b + degParen);
     }
@@ -2826,7 +2882,7 @@ function interpolateTransform(parse, pxComma, pxParen, degParen) {
   function scale(xa, ya, xb, yb, s, q) {
     if (xa !== xb || ya !== yb) {
       var i = s.push(pop(s) + "scale(", null, ",", null, ")");
-      q.push({i: i - 4, x: reinterpolate(xa, xb)}, {i: i - 2, x: reinterpolate(ya, yb)});
+      q.push({i: i - 4, x: interpolateNumber(xa, xb)}, {i: i - 2, x: interpolateNumber(ya, yb)});
     } else if (xb !== 1 || yb !== 1) {
       s.push(pop(s) + "scale(" + xb + "," + yb + ")");
     }
@@ -2852,10 +2908,10 @@ function interpolateTransform(parse, pxComma, pxParen, degParen) {
 var interpolateTransformCss = interpolateTransform(parseCss, "px, ", "px)", "deg)");
 var interpolateTransformSvg = interpolateTransform(parseSvg, ", ", ")", ")");
 
-var rho = Math.SQRT2;
-var rho2 = 2;
-var rho4 = 4;
-var epsilon2 = 1e-12;
+var rho = Math.SQRT2,
+    rho2 = 2,
+    rho4 = 4,
+    epsilon2 = 1e-12;
 
 function cosh(x) {
   return ((x = Math.exp(x)) + 1 / x) / 2;
@@ -2871,7 +2927,7 @@ function tanh(x) {
 
 // p0 = [ux0, uy0, w0]
 // p1 = [ux1, uy1, w1]
-var interpolateZoom = function(p0, p1) {
+function interpolateZoom(p0, p1) {
   var ux0 = p0[0], uy0 = p0[1], w0 = p0[2],
       ux1 = p1[0], uy1 = p1[1], w1 = p1[2],
       dx = ux1 - ux0,
@@ -2915,7 +2971,7 @@ var interpolateZoom = function(p0, p1) {
   i.duration = S * 1000;
 
   return i;
-};
+}
 
 function hsl$1(hue$$1) {
   return function(start, end) {
@@ -2996,23 +3052,32 @@ function cubehelix$1(hue$$1) {
 var cubehelix$2 = cubehelix$1(hue);
 var cubehelixLong = cubehelix$1(nogamma);
 
-var quantize = function(interpolator, n) {
+function piecewise(interpolate, values) {
+  var i = 0, n = values.length - 1, v = values[0], I = new Array(n < 0 ? 0 : n);
+  while (i < n) I[i] = interpolate(v, v = values[++i]);
+  return function(t) {
+    var i = Math.max(0, Math.min(n - 1, Math.floor(t *= n)));
+    return I[i](t - i);
+  };
+}
+
+function quantize(interpolator, n) {
   var samples = new Array(n);
   for (var i = 0; i < n; ++i) samples[i] = interpolator(i / (n - 1));
   return samples;
-};
+}
 
-var frame = 0;
-var timeout = 0;
-var interval = 0;
-var pokeDelay = 1000;
-var taskHead;
-var taskTail;
-var clockLast = 0;
-var clockNow = 0;
-var clockSkew = 0;
-var clock = typeof performance === "object" && performance.now ? performance : Date;
-var setFrame = typeof window === "object" && window.requestAnimationFrame ? window.requestAnimationFrame.bind(window) : function(f) { setTimeout(f, 17); };
+var frame = 0, // is an animation frame pending?
+    timeout = 0, // is a timeout pending?
+    interval = 0, // are any timers active?
+    pokeDelay = 1000, // how frequently we check for clock skew
+    taskHead,
+    taskTail,
+    clockLast = 0,
+    clockNow = 0,
+    clockSkew = 0,
+    clock = typeof performance === "object" && performance.now ? performance : Date,
+    setFrame = typeof window === "object" && window.requestAnimationFrame ? window.requestAnimationFrame.bind(window) : function(f) { setTimeout(f, 17); };
 
 function now() {
   return clockNow || (setFrame(clearNow), clockNow = clock.now() + clockSkew);
@@ -3113,7 +3178,7 @@ function sleep(time) {
   }
 }
 
-var timeout$1 = function(callback, delay, time) {
+function timeout$1(callback, delay, time) {
   var t = new Timer;
   delay = delay == null ? 0 : +delay;
   t.restart(function(elapsed) {
@@ -3121,9 +3186,9 @@ var timeout$1 = function(callback, delay, time) {
     callback(elapsed + delay);
   }, delay, time);
   return t;
-};
+}
 
-var interval$1 = function(callback, delay, time) {
+function interval$1(callback, delay, time) {
   var t = new Timer, total = delay;
   if (delay == null) return t.restart(callback, delay, time), t;
   delay = +delay, time = time == null ? now() : +time;
@@ -3133,7 +3198,7 @@ var interval$1 = function(callback, delay, time) {
     callback(elapsed);
   }, delay, time);
   return t;
-};
+}
 
 var emptyOn = dispatch("start", "end", "interrupt");
 var emptyTween = [];
@@ -3146,11 +3211,11 @@ var RUNNING = 4;
 var ENDING = 5;
 var ENDED = 6;
 
-var schedule = function(node, name, id, index, group, timing) {
+function schedule(node, name, id, index, group, timing) {
   var schedules = node.__transition;
   if (!schedules) node.__transition = {};
   else if (id in schedules) return;
-  create(node, id, {
+  create$1(node, id, {
     name: name,
     index: index, // For context during callback.
     group: group, // For context during callback.
@@ -3163,7 +3228,7 @@ var schedule = function(node, name, id, index, group, timing) {
     timer: null,
     state: CREATED
   });
-};
+}
 
 function init(node, id) {
   var schedule = get$1(node, id);
@@ -3183,7 +3248,7 @@ function get$1(node, id) {
   return schedule;
 }
 
-function create(node, id, self) {
+function create$1(node, id, self) {
   var schedules = node.__transition,
       tween;
 
@@ -3288,7 +3353,7 @@ function create(node, id, self) {
   }
 }
 
-var interrupt = function(node, name) {
+function interrupt(node, name) {
   var schedules = node.__transition,
       schedule$$1,
       active,
@@ -3309,13 +3374,13 @@ var interrupt = function(node, name) {
   }
 
   if (empty) delete node.__transition;
-};
+}
 
-var selection_interrupt = function(name) {
+function selection_interrupt(name) {
   return this.each(function() {
     interrupt(this, name);
   });
-};
+}
 
 function tweenRemove(id, name) {
   var tween0, tween1;
@@ -3366,7 +3431,7 @@ function tweenFunction(id, name, value) {
   };
 }
 
-var transition_tween = function(name, value) {
+function transition_tween(name, value) {
   var id = this._id;
 
   name += "";
@@ -3382,7 +3447,7 @@ var transition_tween = function(name, value) {
   }
 
   return this.each((value == null ? tweenRemove : tweenFunction)(id, name, value));
-};
+}
 
 function tweenValue(transition, name, value) {
   var id = transition._id;
@@ -3397,13 +3462,13 @@ function tweenValue(transition, name, value) {
   };
 }
 
-var interpolate = function(a, b) {
+function interpolate(a, b) {
   var c;
-  return (typeof b === "number" ? reinterpolate
+  return (typeof b === "number" ? interpolateNumber
       : b instanceof color ? interpolateRgb
       : (c = color(b)) ? (b = c, interpolateRgb)
       : interpolateString)(a, b);
-};
+}
 
 function attrRemove$1(name) {
   return function() {
@@ -3467,13 +3532,13 @@ function attrFunctionNS$1(fullname, interpolate$$1, value) {
   };
 }
 
-var transition_attr = function(name, value) {
+function transition_attr(name, value) {
   var fullname = namespace(name), i = fullname === "transform" ? interpolateTransformSvg : interpolate;
   return this.attrTween(name, typeof value === "function"
       ? (fullname.local ? attrFunctionNS$1 : attrFunction$1)(fullname, i, tweenValue(this, "attr." + name, value))
       : value == null ? (fullname.local ? attrRemoveNS$1 : attrRemove$1)(fullname)
       : (fullname.local ? attrConstantNS$1 : attrConstant$1)(fullname, i, value + ""));
-};
+}
 
 function attrTweenNS(fullname, value) {
   function tween() {
@@ -3497,14 +3562,14 @@ function attrTween(name, value) {
   return tween;
 }
 
-var transition_attrTween = function(name, value) {
+function transition_attrTween(name, value) {
   var key = "attr." + name;
   if (arguments.length < 2) return (key = this.tween(key)) && key._value;
   if (value == null) return this.tween(key, null);
   if (typeof value !== "function") throw new Error;
   var fullname = namespace(name);
   return this.tween(key, (fullname.local ? attrTweenNS : attrTween)(fullname, value));
-};
+}
 
 function delayFunction(id, value) {
   return function() {
@@ -3518,7 +3583,7 @@ function delayConstant(id, value) {
   };
 }
 
-var transition_delay = function(value) {
+function transition_delay(value) {
   var id = this._id;
 
   return arguments.length
@@ -3526,7 +3591,7 @@ var transition_delay = function(value) {
           ? delayFunction
           : delayConstant)(id, value))
       : get$1(this.node(), id).delay;
-};
+}
 
 function durationFunction(id, value) {
   return function() {
@@ -3540,7 +3605,7 @@ function durationConstant(id, value) {
   };
 }
 
-var transition_duration = function(value) {
+function transition_duration(value) {
   var id = this._id;
 
   return arguments.length
@@ -3548,7 +3613,7 @@ var transition_duration = function(value) {
           ? durationFunction
           : durationConstant)(id, value))
       : get$1(this.node(), id).duration;
-};
+}
 
 function easeConstant(id, value) {
   if (typeof value !== "function") throw new Error;
@@ -3557,15 +3622,15 @@ function easeConstant(id, value) {
   };
 }
 
-var transition_ease = function(value) {
+function transition_ease(value) {
   var id = this._id;
 
   return arguments.length
       ? this.each(easeConstant(id, value))
       : get$1(this.node(), id).ease;
-};
+}
 
-var transition_filter = function(match) {
+function transition_filter(match) {
   if (typeof match !== "function") match = matcher$1(match);
 
   for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
@@ -3577,9 +3642,9 @@ var transition_filter = function(match) {
   }
 
   return new Transition(subgroups, this._parents, this._name, this._id);
-};
+}
 
-var transition_merge = function(transition$$1) {
+function transition_merge(transition$$1) {
   if (transition$$1._id !== this._id) throw new Error;
 
   for (var groups0 = this._groups, groups1 = transition$$1._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
@@ -3595,7 +3660,7 @@ var transition_merge = function(transition$$1) {
   }
 
   return new Transition(merges, this._parents, this._name, this._id);
-};
+}
 
 function start(name) {
   return (name + "").trim().split(/^|\s+/).every(function(t) {
@@ -3620,13 +3685,13 @@ function onFunction(id, name, listener) {
   };
 }
 
-var transition_on = function(name, listener) {
+function transition_on(name, listener) {
   var id = this._id;
 
   return arguments.length < 2
       ? get$1(this.node(), id).on.on(name)
       : this.each(onFunction(id, name, listener));
-};
+}
 
 function removeFunction(id) {
   return function() {
@@ -3636,19 +3701,19 @@ function removeFunction(id) {
   };
 }
 
-var transition_remove = function() {
+function transition_remove() {
   return this.on("end.remove", removeFunction(this._id));
-};
+}
 
-var transition_select = function(select) {
+function transition_select(select$$1) {
   var name = this._name,
       id = this._id;
 
-  if (typeof select !== "function") select = selector(select);
+  if (typeof select$$1 !== "function") select$$1 = selector(select$$1);
 
   for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
     for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
-      if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
+      if ((node = group[i]) && (subnode = select$$1.call(node, node.__data__, i, group))) {
         if ("__data__" in node) subnode.__data__ = node.__data__;
         subgroup[i] = subnode;
         schedule(subgroup[i], name, id, i, subgroup, get$1(node, id));
@@ -3657,18 +3722,18 @@ var transition_select = function(select) {
   }
 
   return new Transition(subgroups, this._parents, name, id);
-};
+}
 
-var transition_selectAll = function(select) {
+function transition_selectAll(select$$1) {
   var name = this._name,
       id = this._id;
 
-  if (typeof select !== "function") select = selectorAll(select);
+  if (typeof select$$1 !== "function") select$$1 = selectorAll(select$$1);
 
   for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
     for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
       if (node = group[i]) {
-        for (var children = select.call(node, node.__data__, i, group), child, inherit = get$1(node, id), k = 0, l = children.length; k < l; ++k) {
+        for (var children = select$$1.call(node, node.__data__, i, group), child, inherit = get$1(node, id), k = 0, l = children.length; k < l; ++k) {
           if (child = children[k]) {
             schedule(child, name, id, k, children, inherit);
           }
@@ -3680,13 +3745,13 @@ var transition_selectAll = function(select) {
   }
 
   return new Transition(subgroups, parents, name, id);
-};
+}
 
 var Selection$1 = selection.prototype.constructor;
 
-var transition_selection = function() {
+function transition_selection() {
   return new Selection$1(this._groups, this._parents);
-};
+}
 
 function styleRemove$1(name, interpolate$$1) {
   var value00,
@@ -3732,7 +3797,7 @@ function styleFunction$1(name, interpolate$$1, value) {
   };
 }
 
-var transition_style = function(name, value, priority) {
+function transition_style(name, value, priority) {
   var i = (name += "") === "transform" ? interpolateTransformCss : interpolate;
   return value == null ? this
           .styleTween(name, styleRemove$1(name, i))
@@ -3740,7 +3805,7 @@ var transition_style = function(name, value, priority) {
       : this.styleTween(name, typeof value === "function"
           ? styleFunction$1(name, i, tweenValue(this, "style." + name, value))
           : styleConstant$1(name, i, value + ""), priority);
-};
+}
 
 function styleTween(name, value, priority) {
   function tween() {
@@ -3753,13 +3818,13 @@ function styleTween(name, value, priority) {
   return tween;
 }
 
-var transition_styleTween = function(name, value, priority) {
+function transition_styleTween(name, value, priority) {
   var key = "style." + (name += "");
   if (arguments.length < 2) return (key = this.tween(key)) && key._value;
   if (value == null) return this.tween(key, null);
   if (typeof value !== "function") throw new Error;
   return this.tween(key, styleTween(name, value, priority == null ? "" : priority));
-};
+}
 
 function textConstant$1(value) {
   return function() {
@@ -3774,13 +3839,13 @@ function textFunction$1(value) {
   };
 }
 
-var transition_text = function(value) {
+function transition_text(value) {
   return this.tween("text", typeof value === "function"
       ? textFunction$1(tweenValue(this, "text", value))
       : textConstant$1(value == null ? "" : value + ""));
-};
+}
 
-var transition_transition = function() {
+function transition_transition() {
   var name = this._name,
       id0 = this._id,
       id1 = newId();
@@ -3800,7 +3865,7 @@ var transition_transition = function() {
   }
 
   return new Transition(groups, this._parents, name, id1);
-};
+}
 
 var id = 0;
 
@@ -3914,8 +3979,8 @@ var polyInOut = (function custom(e) {
   return polyInOut;
 })(exponent);
 
-var pi = Math.PI;
-var halfPi = pi / 2;
+var pi = Math.PI,
+    halfPi = pi / 2;
 
 function sinIn(t) {
   return 1 - Math.cos(t * halfPi);
@@ -3953,16 +4018,16 @@ function circleInOut(t) {
   return ((t *= 2) <= 1 ? 1 - Math.sqrt(1 - t * t) : Math.sqrt(1 - (t -= 2) * t) + 1) / 2;
 }
 
-var b1 = 4 / 11;
-var b2 = 6 / 11;
-var b3 = 8 / 11;
-var b4 = 3 / 4;
-var b5 = 9 / 11;
-var b6 = 10 / 11;
-var b7 = 15 / 16;
-var b8 = 21 / 22;
-var b9 = 63 / 64;
-var b0 = 1 / b1 / b1;
+var b1 = 4 / 11,
+    b2 = 6 / 11,
+    b3 = 8 / 11,
+    b4 = 3 / 4,
+    b5 = 9 / 11,
+    b6 = 10 / 11,
+    b7 = 15 / 16,
+    b8 = 21 / 22,
+    b9 = 63 / 64,
+    b0 = 1 / b1 / b1;
 
 function bounceIn(t) {
   return 1 - bounceOut(1 - t);
@@ -4014,9 +4079,9 @@ var backInOut = (function custom(s) {
   return backInOut;
 })(overshoot);
 
-var tau = 2 * Math.PI;
-var amplitude = 1;
-var period = 0.3;
+var tau = 2 * Math.PI,
+    amplitude = 1,
+    period = 0.3;
 
 var elasticIn = (function custom(a, p) {
   var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau);
@@ -4076,7 +4141,7 @@ function inherit(node, id) {
   return timing;
 }
 
-var selection_transition = function(name) {
+function selection_transition(name) {
   var id,
       timing;
 
@@ -4095,14 +4160,14 @@ var selection_transition = function(name) {
   }
 
   return new Transition(groups, this._parents, name, id);
-};
+}
 
 selection.prototype.interrupt = selection_interrupt;
 selection.prototype.transition = selection_transition;
 
 var root$1 = [null];
 
-var active = function(node, name) {
+function active(node, name) {
   var schedules = node.__transition,
       schedule$$1,
       i;
@@ -4117,33 +4182,33 @@ var active = function(node, name) {
   }
 
   return null;
-};
+}
 
-var constant$4 = function(x) {
+function constant$4(x) {
   return function() {
     return x;
   };
-};
+}
 
-var BrushEvent = function(target, type, selection) {
+function BrushEvent(target, type, selection) {
   this.target = target;
   this.type = type;
   this.selection = selection;
-};
+}
 
 function nopropagation$1() {
   exports.event.stopImmediatePropagation();
 }
 
-var noevent$1 = function() {
+function noevent$1() {
   exports.event.preventDefault();
   exports.event.stopImmediatePropagation();
-};
+}
 
-var MODE_DRAG = {name: "drag"};
-var MODE_SPACE = {name: "space"};
-var MODE_HANDLE = {name: "handle"};
-var MODE_CENTER = {name: "center"};
+var MODE_DRAG = {name: "drag"},
+    MODE_SPACE = {name: "space"},
+    MODE_HANDLE = {name: "handle"},
+    MODE_CENTER = {name: "center"};
 
 var X = {
   name: "x",
@@ -4228,7 +4293,7 @@ function type(t) {
 }
 
 // Ignore right-click, since that should open the context menu.
-function defaultFilter() {
+function defaultFilter$1() {
   return !exports.event.button;
 }
 
@@ -4238,12 +4303,12 @@ function defaultExtent() {
 }
 
 // Like d3.local, but with the name “__brush” rather than auto-generated.
-function local(node) {
+function local$1(node) {
   while (!node.__brush) if (!(node = node.parentNode)) return;
   return node.__brush;
 }
 
-function empty(extent) {
+function empty$1(extent) {
   return extent[0][0] === extent[1][0]
       || extent[0][1] === extent[1][1];
 }
@@ -4261,13 +4326,13 @@ function brushY() {
   return brush$1(Y);
 }
 
-var brush = function() {
+function brush() {
   return brush$1(XY);
-};
+}
 
 function brush$1(dim) {
   var extent = defaultExtent,
-      filter = defaultFilter,
+      filter = defaultFilter$1,
       listeners = dispatch(brush, "start", "brush", "end"),
       handleSize = 6,
       touchending;
@@ -4284,7 +4349,7 @@ function brush$1(dim) {
         .attr("cursor", cursors.overlay)
       .merge(overlay)
         .each(function() {
-          var extent = local(this).extent;
+          var extent = local$1(this).extent;
           select(this)
               .attr("x", extent[0][0])
               .attr("y", extent[0][1])
@@ -4319,7 +4384,7 @@ function brush$1(dim) {
         .on("mousedown.brush touchstart.brush", started);
   }
 
-  brush.move = function(group, selection) {
+  brush.move = function(group, selection$$1) {
     if (group.selection) {
       group
           .on("start.brush", function() { emitter(this, arguments).beforestart().start(); })
@@ -4329,11 +4394,11 @@ function brush$1(dim) {
                 state = that.__brush,
                 emit = emitter(that, arguments),
                 selection0 = state.selection,
-                selection1 = dim.input(typeof selection === "function" ? selection.apply(this, arguments) : selection, state.extent),
+                selection1 = dim.input(typeof selection$$1 === "function" ? selection$$1.apply(this, arguments) : selection$$1, state.extent),
                 i = interpolateValue(selection0, selection1);
 
             function tween(t) {
-              state.selection = t === 1 && empty(selection1) ? null : i(t);
+              state.selection = t === 1 && empty$1(selection1) ? null : i(t);
               redraw.call(that);
               emit.brush();
             }
@@ -4346,11 +4411,11 @@ function brush$1(dim) {
             var that = this,
                 args = arguments,
                 state = that.__brush,
-                selection1 = dim.input(typeof selection === "function" ? selection.apply(that, args) : selection, state.extent),
+                selection1 = dim.input(typeof selection$$1 === "function" ? selection$$1.apply(that, args) : selection$$1, state.extent),
                 emit = emitter(that, args).beforestart();
 
             interrupt(that);
-            state.selection = selection1 == null || empty(selection1) ? null : selection1;
+            state.selection = selection1 == null || empty$1(selection1) ? null : selection1;
             redraw.call(that);
             emit.start().brush().end();
           });
@@ -4359,22 +4424,22 @@ function brush$1(dim) {
 
   function redraw() {
     var group = select(this),
-        selection = local(this).selection;
+        selection$$1 = local$1(this).selection;
 
-    if (selection) {
+    if (selection$$1) {
       group.selectAll(".selection")
           .style("display", null)
-          .attr("x", selection[0][0])
-          .attr("y", selection[0][1])
-          .attr("width", selection[1][0] - selection[0][0])
-          .attr("height", selection[1][1] - selection[0][1]);
+          .attr("x", selection$$1[0][0])
+          .attr("y", selection$$1[0][1])
+          .attr("width", selection$$1[1][0] - selection$$1[0][0])
+          .attr("height", selection$$1[1][1] - selection$$1[0][1]);
 
       group.selectAll(".handle")
           .style("display", null)
-          .attr("x", function(d) { return d.type[d.type.length - 1] === "e" ? selection[1][0] - handleSize / 2 : selection[0][0] - handleSize / 2; })
-          .attr("y", function(d) { return d.type[0] === "s" ? selection[1][1] - handleSize / 2 : selection[0][1] - handleSize / 2; })
-          .attr("width", function(d) { return d.type === "n" || d.type === "s" ? selection[1][0] - selection[0][0] + handleSize : handleSize; })
-          .attr("height", function(d) { return d.type === "e" || d.type === "w" ? selection[1][1] - selection[0][1] + handleSize : handleSize; });
+          .attr("x", function(d) { return d.type[d.type.length - 1] === "e" ? selection$$1[1][0] - handleSize / 2 : selection$$1[0][0] - handleSize / 2; })
+          .attr("y", function(d) { return d.type[0] === "s" ? selection$$1[1][1] - handleSize / 2 : selection$$1[0][1] - handleSize / 2; })
+          .attr("width", function(d) { return d.type === "n" || d.type === "s" ? selection$$1[1][0] - selection$$1[0][0] + handleSize : handleSize; })
+          .attr("height", function(d) { return d.type === "e" || d.type === "w" ? selection$$1[1][1] - selection$$1[0][1] + handleSize : handleSize; });
     }
 
     else {
@@ -4430,9 +4495,9 @@ function brush$1(dim) {
         mode = (exports.event.metaKey ? type = "overlay" : type) === "selection" ? MODE_DRAG : (exports.event.altKey ? MODE_CENTER : MODE_HANDLE),
         signX = dim === Y ? null : signsX[type],
         signY = dim === X ? null : signsY[type],
-        state = local(that),
+        state = local$1(that),
         extent = state.extent,
-        selection = state.selection,
+        selection$$1 = state.selection,
         W = extent[0][0], w0, w1,
         N = extent[0][1], n0, n1,
         E = extent[1][0], e0, e1,
@@ -4444,19 +4509,19 @@ function brush$1(dim) {
         lockX,
         lockY,
         point0 = mouse(that),
-        point = point0,
+        point$$1 = point0,
         emit = emitter(that, arguments).beforestart();
 
     if (type === "overlay") {
-      state.selection = selection = [
+      state.selection = selection$$1 = [
         [w0 = dim === Y ? W : point0[0], n0 = dim === X ? N : point0[1]],
         [e0 = dim === Y ? E : w0, s0 = dim === X ? S : n0]
       ];
     } else {
-      w0 = selection[0][0];
-      n0 = selection[0][1];
-      e0 = selection[1][0];
-      s0 = selection[1][1];
+      w0 = selection$$1[0][0];
+      n0 = selection$$1[0][1];
+      e0 = selection$$1[1][0];
+      s0 = selection$$1[1][1];
     }
 
     w1 = w0;
@@ -4492,10 +4557,10 @@ function brush$1(dim) {
     function moved() {
       var point1 = mouse(that);
       if (shifting && !lockX && !lockY) {
-        if (Math.abs(point1[0] - point[0]) > Math.abs(point1[1] - point[1])) lockY = true;
+        if (Math.abs(point1[0] - point$$1[0]) > Math.abs(point1[1] - point$$1[1])) lockY = true;
         else lockX = true;
       }
-      point = point1;
+      point$$1 = point1;
       moving = true;
       noevent$1();
       move();
@@ -4504,8 +4569,8 @@ function brush$1(dim) {
     function move() {
       var t;
 
-      dx = point[0] - point0[0];
-      dy = point[1] - point0[1];
+      dx = point$$1[0] - point0[0];
+      dy = point$$1[1] - point0[1];
 
       switch (mode) {
         case MODE_SPACE:
@@ -4542,14 +4607,14 @@ function brush$1(dim) {
         if (type in flipY) overlay.attr("cursor", cursors[type = flipY[type]]);
       }
 
-      if (state.selection) selection = state.selection; // May be set by brush.move!
-      if (lockX) w1 = selection[0][0], e1 = selection[1][0];
-      if (lockY) n1 = selection[0][1], s1 = selection[1][1];
+      if (state.selection) selection$$1 = state.selection; // May be set by brush.move!
+      if (lockX) w1 = selection$$1[0][0], e1 = selection$$1[1][0];
+      if (lockY) n1 = selection$$1[0][1], s1 = selection$$1[1][1];
 
-      if (selection[0][0] !== w1
-          || selection[0][1] !== n1
-          || selection[1][0] !== e1
-          || selection[1][1] !== s1) {
+      if (selection$$1[0][0] !== w1
+          || selection$$1[0][1] !== n1
+          || selection$$1[1][0] !== e1
+          || selection$$1[1][1] !== s1) {
         state.selection = [[w1, n1], [e1, s1]];
         redraw.call(that);
         emit.brush();
@@ -4569,8 +4634,8 @@ function brush$1(dim) {
       }
       group.attr("pointer-events", "all");
       overlay.attr("cursor", cursors.overlay);
-      if (state.selection) selection = state.selection; // May be set by brush.move (on start)!
-      if (empty(selection)) state.selection = null, redraw.call(that);
+      if (state.selection) selection$$1 = state.selection; // May be set by brush.move (on start)!
+      if (empty$1(selection$$1)) state.selection = null, redraw.call(that);
       emit.end();
     }
 
@@ -4687,7 +4752,7 @@ function compareValue(compare) {
   };
 }
 
-var chord = function() {
+function chord() {
   var padAngle = 0,
       sortGroups = null,
       sortSubgroups = null,
@@ -4795,20 +4860,20 @@ var chord = function() {
   };
 
   return chord;
-};
+}
 
 var slice$2 = Array.prototype.slice;
 
-var constant$5 = function(x) {
+function constant$5(x) {
   return function() {
     return x;
   };
-};
+}
 
-var pi$2 = Math.PI;
-var tau$2 = 2 * pi$2;
-var epsilon$1 = 1e-6;
-var tauEpsilon = tau$2 - epsilon$1;
+var pi$2 = Math.PI,
+    tau$2 = 2 * pi$2,
+    epsilon$1 = 1e-6,
+    tauEpsilon = tau$2 - epsilon$1;
 
 function Path() {
   this._x0 = this._y0 = // start of current subpath
@@ -4859,7 +4924,7 @@ Path.prototype = path.prototype = {
     }
 
     // Or, is (x1,y1) coincident with (x0,y0)? Do nothing.
-    else if (!(l01_2 > epsilon$1)) {}
+    else if (!(l01_2 > epsilon$1));
 
     // Or, are (x0,y0), (x1,y1) and (x2,y2) collinear?
     // Equivalently, is (x1,y1) coincident with (x2,y2)?
@@ -4954,7 +5019,7 @@ function defaultEndAngle(d) {
   return d.endAngle;
 }
 
-var ribbon = function() {
+function ribbon() {
   var source = defaultSource,
       target = defaultTarget,
       radius = defaultRadius,
@@ -5011,11 +5076,11 @@ var ribbon = function() {
   };
 
   ribbon.context = function(_) {
-    return arguments.length ? (context = _ == null ? null : _, ribbon) : context;
+    return arguments.length ? ((context = _ == null ? null : _), ribbon) : context;
   };
 
   return ribbon;
-};
+}
 
 var prefix = "$";
 
@@ -5091,7 +5156,7 @@ function map$1(object, f) {
   return map;
 }
 
-var nest = function() {
+function nest() {
   var keys = [],
       sortKeys = [],
       sortValues,
@@ -5113,115 +5178,533 @@ var nest = function() {
         values,
         result = createResult();
 
-    while (++i < n) {
-      if (values = valuesByKey.get(keyValue = key(value = array[i]) + "")) {
-        values.push(value);
+    while (++i < n) {
+      if (values = valuesByKey.get(keyValue = key(value = array[i]) + "")) {
+        values.push(value);
+      } else {
+        valuesByKey.set(keyValue, [value]);
+      }
+    }
+
+    valuesByKey.each(function(values, key) {
+      setResult(result, key, apply(values, depth, createResult, setResult));
+    });
+
+    return result;
+  }
+
+  function entries(map, depth) {
+    if (++depth > keys.length) return map;
+    var array, sortKey = sortKeys[depth - 1];
+    if (rollup != null && depth >= keys.length) array = map.entries();
+    else array = [], map.each(function(v, k) { array.push({key: k, values: entries(v, depth)}); });
+    return sortKey != null ? array.sort(function(a, b) { return sortKey(a.key, b.key); }) : array;
+  }
+
+  return nest = {
+    object: function(array) { return apply(array, 0, createObject, setObject); },
+    map: function(array) { return apply(array, 0, createMap, setMap); },
+    entries: function(array) { return entries(apply(array, 0, createMap, setMap), 0); },
+    key: function(d) { keys.push(d); return nest; },
+    sortKeys: function(order) { sortKeys[keys.length - 1] = order; return nest; },
+    sortValues: function(order) { sortValues = order; return nest; },
+    rollup: function(f) { rollup = f; return nest; }
+  };
+}
+
+function createObject() {
+  return {};
+}
+
+function setObject(object, key, value) {
+  object[key] = value;
+}
+
+function createMap() {
+  return map$1();
+}
+
+function setMap(map, key, value) {
+  map.set(key, value);
+}
+
+function Set() {}
+
+var proto = map$1.prototype;
+
+Set.prototype = set$2.prototype = {
+  constructor: Set,
+  has: proto.has,
+  add: function(value) {
+    value += "";
+    this[prefix + value] = value;
+    return this;
+  },
+  remove: proto.remove,
+  clear: proto.clear,
+  values: proto.keys,
+  size: proto.size,
+  empty: proto.empty,
+  each: proto.each
+};
+
+function set$2(object, f) {
+  var set = new Set;
+
+  // Copy constructor.
+  if (object instanceof Set) object.each(function(value) { set.add(value); });
+
+  // Otherwise, assume it’s an array.
+  else if (object) {
+    var i = -1, n = object.length;
+    if (f == null) while (++i < n) set.add(object[i]);
+    else while (++i < n) set.add(f(object[i], i, object));
+  }
+
+  return set;
+}
+
+function keys(map) {
+  var keys = [];
+  for (var key in map) keys.push(key);
+  return keys;
+}
+
+function values(map) {
+  var values = [];
+  for (var key in map) values.push(map[key]);
+  return values;
+}
+
+function entries(map) {
+  var entries = [];
+  for (var key in map) entries.push({key: key, value: map[key]});
+  return entries;
+}
+
+var array$2 = Array.prototype;
+
+var slice$3 = array$2.slice;
+
+function ascending$2(a, b) {
+  return a - b;
+}
+
+function area(ring) {
+  var i = 0, n = ring.length, area = ring[n - 1][1] * ring[0][0] - ring[n - 1][0] * ring[0][1];
+  while (++i < n) area += ring[i - 1][1] * ring[i][0] - ring[i - 1][0] * ring[i][1];
+  return area;
+}
+
+function constant$6(x) {
+  return function() {
+    return x;
+  };
+}
+
+function contains(ring, hole) {
+  var i = -1, n = hole.length, c;
+  while (++i < n) if (c = ringContains(ring, hole[i])) return c;
+  return 0;
+}
+
+function ringContains(ring, point) {
+  var x = point[0], y = point[1], contains = -1;
+  for (var i = 0, n = ring.length, j = n - 1; i < n; j = i++) {
+    var pi = ring[i], xi = pi[0], yi = pi[1], pj = ring[j], xj = pj[0], yj = pj[1];
+    if (segmentContains(pi, pj, point)) return 0;
+    if (((yi > y) !== (yj > y)) && ((x < (xj - xi) * (y - yi) / (yj - yi) + xi))) contains = -contains;
+  }
+  return contains;
+}
+
+function segmentContains(a, b, c) {
+  var i; return collinear(a, b, c) && within(a[i = +(a[0] === b[0])], c[i], b[i]);
+}
+
+function collinear(a, b, c) {
+  return (b[0] - a[0]) * (c[1] - a[1]) === (c[0] - a[0]) * (b[1] - a[1]);
+}
+
+function within(p, q, r) {
+  return p <= q && q <= r || r <= q && q <= p;
+}
+
+function noop$1() {}
+
+var cases = [
+  [],
+  [[[1.0, 1.5], [0.5, 1.0]]],
+  [[[1.5, 1.0], [1.0, 1.5]]],
+  [[[1.5, 1.0], [0.5, 1.0]]],
+  [[[1.0, 0.5], [1.5, 1.0]]],
+  [[[1.0, 1.5], [0.5, 1.0]], [[1.0, 0.5], [1.5, 1.0]]],
+  [[[1.0, 0.5], [1.0, 1.5]]],
+  [[[1.0, 0.5], [0.5, 1.0]]],
+  [[[0.5, 1.0], [1.0, 0.5]]],
+  [[[1.0, 1.5], [1.0, 0.5]]],
+  [[[0.5, 1.0], [1.0, 0.5]], [[1.5, 1.0], [1.0, 1.5]]],
+  [[[1.5, 1.0], [1.0, 0.5]]],
+  [[[0.5, 1.0], [1.5, 1.0]]],
+  [[[1.0, 1.5], [1.5, 1.0]]],
+  [[[0.5, 1.0], [1.0, 1.5]]],
+  []
+];
+
+function contours() {
+  var dx = 1,
+      dy = 1,
+      threshold$$1 = thresholdSturges,
+      smooth = smoothLinear;
+
+  function contours(values) {
+    var tz = threshold$$1(values);
+
+    // Convert number of thresholds into uniform thresholds.
+    if (!Array.isArray(tz)) {
+      var domain = extent(values), start = domain[0], stop = domain[1];
+      tz = tickStep(start, stop, tz);
+      tz = sequence(Math.floor(start / tz) * tz, Math.floor(stop / tz) * tz, tz);
+    } else {
+      tz = tz.slice().sort(ascending$2);
+    }
+
+    return tz.map(function(value) {
+      return contour(values, value);
+    });
+  }
+
+  // Accumulate, smooth contour rings, assign holes to exterior rings.
+  // Based on https://github.com/mbostock/shapefile/blob/v0.6.2/shp/polygon.js
+  function contour(values, value) {
+    var polygons = [],
+        holes = [];
+
+    isorings(values, value, function(ring) {
+      smooth(ring, values, value);
+      if (area(ring) > 0) polygons.push([ring]);
+      else holes.push(ring);
+    });
+
+    holes.forEach(function(hole) {
+      for (var i = 0, n = polygons.length, polygon; i < n; ++i) {
+        if (contains((polygon = polygons[i])[0], hole) !== -1) {
+          polygon.push(hole);
+          return;
+        }
+      }
+    });
+
+    return {
+      type: "MultiPolygon",
+      value: value,
+      coordinates: polygons
+    };
+  }
+
+  // Marching squares with isolines stitched into rings.
+  // Based on https://github.com/topojson/topojson-client/blob/v3.0.0/src/stitch.js
+  function isorings(values, value, callback) {
+    var fragmentByStart = new Array,
+        fragmentByEnd = new Array,
+        x, y, t0, t1, t2, t3;
+
+    // Special case for the first row (y = -1, t2 = t3 = 0).
+    x = y = -1;
+    t1 = values[0] >= value;
+    cases[t1 << 1].forEach(stitch);
+    while (++x < dx - 1) {
+      t0 = t1, t1 = values[x + 1] >= value;
+      cases[t0 | t1 << 1].forEach(stitch);
+    }
+    cases[t1 << 0].forEach(stitch);
+
+    // General case for the intermediate rows.
+    while (++y < dy - 1) {
+      x = -1;
+      t1 = values[y * dx + dx] >= value;
+      t2 = values[y * dx] >= value;
+      cases[t1 << 1 | t2 << 2].forEach(stitch);
+      while (++x < dx - 1) {
+        t0 = t1, t1 = values[y * dx + dx + x + 1] >= value;
+        t3 = t2, t2 = values[y * dx + x + 1] >= value;
+        cases[t0 | t1 << 1 | t2 << 2 | t3 << 3].forEach(stitch);
+      }
+      cases[t1 | t2 << 3].forEach(stitch);
+    }
+
+    // Special case for the last row (y = dy - 1, t0 = t1 = 0).
+    x = -1;
+    t2 = values[y * dx] >= value;
+    cases[t2 << 2].forEach(stitch);
+    while (++x < dx - 1) {
+      t3 = t2, t2 = values[y * dx + x + 1] >= value;
+      cases[t2 << 2 | t3 << 3].forEach(stitch);
+    }
+    cases[t2 << 3].forEach(stitch);
+
+    function stitch(line) {
+      var start = [line[0][0] + x, line[0][1] + y],
+          end = [line[1][0] + x, line[1][1] + y],
+          startIndex = index(start),
+          endIndex = index(end),
+          f, g;
+      if (f = fragmentByEnd[startIndex]) {
+        if (g = fragmentByStart[endIndex]) {
+          delete fragmentByEnd[f.end];
+          delete fragmentByStart[g.start];
+          if (f === g) {
+            f.ring.push(end);
+            callback(f.ring);
+          } else {
+            fragmentByStart[f.start] = fragmentByEnd[g.end] = {start: f.start, end: g.end, ring: f.ring.concat(g.ring)};
+          }
+        } else {
+          delete fragmentByEnd[f.end];
+          f.ring.push(end);
+          fragmentByEnd[f.end = endIndex] = f;
+        }
+      } else if (f = fragmentByStart[endIndex]) {
+        if (g = fragmentByEnd[startIndex]) {
+          delete fragmentByStart[f.start];
+          delete fragmentByEnd[g.end];
+          if (f === g) {
+            f.ring.push(end);
+            callback(f.ring);
+          } else {
+            fragmentByStart[g.start] = fragmentByEnd[f.end] = {start: g.start, end: f.end, ring: g.ring.concat(f.ring)};
+          }
+        } else {
+          delete fragmentByStart[f.start];
+          f.ring.unshift(start);
+          fragmentByStart[f.start = startIndex] = f;
+        }
       } else {
-        valuesByKey.set(keyValue, [value]);
+        fragmentByStart[startIndex] = fragmentByEnd[endIndex] = {start: startIndex, end: endIndex, ring: [start, end]};
       }
     }
+  }
 
-    valuesByKey.each(function(values, key) {
-      setResult(result, key, apply(values, depth, createResult, setResult));
-    });
-
-    return result;
+  function index(point) {
+    return point[0] * 2 + point[1] * (dx + 1) * 4;
   }
 
-  function entries(map, depth) {
-    if (++depth > keys.length) return map;
-    var array, sortKey = sortKeys[depth - 1];
-    if (rollup != null && depth >= keys.length) array = map.entries();
-    else array = [], map.each(function(v, k) { array.push({key: k, values: entries(v, depth)}); });
-    return sortKey != null ? array.sort(function(a, b) { return sortKey(a.key, b.key); }) : array;
+  function smoothLinear(ring, values, value) {
+    ring.forEach(function(point) {
+      var x = point[0],
+          y = point[1],
+          xt = x | 0,
+          yt = y | 0,
+          v0,
+          v1 = values[yt * dx + xt];
+      if (x > 0 && x < dx && xt === x) {
+        v0 = values[yt * dx + xt - 1];
+        point[0] = x + (value - v0) / (v1 - v0) - 0.5;
+      }
+      if (y > 0 && y < dy && yt === y) {
+        v0 = values[(yt - 1) * dx + xt];
+        point[1] = y + (value - v0) / (v1 - v0) - 0.5;
+      }
+    });
   }
 
-  return nest = {
-    object: function(array) { return apply(array, 0, createObject, setObject); },
-    map: function(array) { return apply(array, 0, createMap, setMap); },
-    entries: function(array) { return entries(apply(array, 0, createMap, setMap), 0); },
-    key: function(d) { keys.push(d); return nest; },
-    sortKeys: function(order) { sortKeys[keys.length - 1] = order; return nest; },
-    sortValues: function(order) { sortValues = order; return nest; },
-    rollup: function(f) { rollup = f; return nest; }
+  contours.contour = contour;
+
+  contours.size = function(_) {
+    if (!arguments.length) return [dx, dy];
+    var _0 = Math.ceil(_[0]), _1 = Math.ceil(_[1]);
+    if (!(_0 > 0) || !(_1 > 0)) throw new Error("invalid size");
+    return dx = _0, dy = _1, contours;
   };
-};
 
-function createObject() {
-  return {};
+  contours.thresholds = function(_) {
+    return arguments.length ? (threshold$$1 = typeof _ === "function" ? _ : Array.isArray(_) ? constant$6(slice$3.call(_)) : constant$6(_), contours) : threshold$$1;
+  };
+
+  contours.smooth = function(_) {
+    return arguments.length ? (smooth = _ ? smoothLinear : noop$1, contours) : smooth === smoothLinear;
+  };
+
+  return contours;
 }
 
-function setObject(object, key, value) {
-  object[key] = value;
+// TODO Optimize edge cases.
+// TODO Optimize index calculation.
+// TODO Optimize arguments.
+function blurX(source, target, r) {
+  var n = source.width,
+      m = source.height,
+      w = (r << 1) + 1;
+  for (var j = 0; j < m; ++j) {
+    for (var i = 0, sr = 0; i < n + r; ++i) {
+      if (i < n) {
+        sr += source.data[i + j * n];
+      }
+      if (i >= r) {
+        if (i >= w) {
+          sr -= source.data[i - w + j * n];
+        }
+        target.data[i - r + j * n] = sr / Math.min(i + 1, n - 1 + w - i, w);
+      }
+    }
+  }
 }
 
-function createMap() {
-  return map$1();
+// TODO Optimize edge cases.
+// TODO Optimize index calculation.
+// TODO Optimize arguments.
+function blurY(source, target, r) {
+  var n = source.width,
+      m = source.height,
+      w = (r << 1) + 1;
+  for (var i = 0; i < n; ++i) {
+    for (var j = 0, sr = 0; j < m + r; ++j) {
+      if (j < m) {
+        sr += source.data[i + j * n];
+      }
+      if (j >= r) {
+        if (j >= w) {
+          sr -= source.data[i + (j - w) * n];
+        }
+        target.data[i + (j - r) * n] = sr / Math.min(j + 1, m - 1 + w - j, w);
+      }
+    }
+  }
 }
 
-function setMap(map, key, value) {
-  map.set(key, value);
+function defaultX(d) {
+  return d[0];
 }
 
-function Set() {}
+function defaultY(d) {
+  return d[1];
+}
 
-var proto = map$1.prototype;
+function defaultWeight() {
+  return 1;
+}
+
+function density() {
+  var x = defaultX,
+      y = defaultY,
+      weight = defaultWeight,
+      dx = 960,
+      dy = 500,
+      r = 20, // blur radius
+      k = 2, // log2(grid cell size)
+      o = r * 3, // grid offset, to pad for blur
+      n = (dx + o * 2) >> k, // grid width
+      m = (dy + o * 2) >> k, // grid height
+      threshold$$1 = constant$6(20);
+
+  function density(data) {
+    var values0 = new Float32Array(n * m),
+        values1 = new Float32Array(n * m);
+
+    data.forEach(function(d, i, data) {
+      var xi = (+x(d, i, data) + o) >> k,
+          yi = (+y(d, i, data) + o) >> k,
+          wi = +weight(d, i, data);
+      if (xi >= 0 && xi < n && yi >= 0 && yi < m) {
+        values0[xi + yi * n] += wi;
+      }
+    });
 
-Set.prototype = set$2.prototype = {
-  constructor: Set,
-  has: proto.has,
-  add: function(value) {
-    value += "";
-    this[prefix + value] = value;
-    return this;
-  },
-  remove: proto.remove,
-  clear: proto.clear,
-  values: proto.keys,
-  size: proto.size,
-  empty: proto.empty,
-  each: proto.each
-};
+    // TODO Optimize.
+    blurX({width: n, height: m, data: values0}, {width: n, height: m, data: values1}, r >> k);
+    blurY({width: n, height: m, data: values1}, {width: n, height: m, data: values0}, r >> k);
+    blurX({width: n, height: m, data: values0}, {width: n, height: m, data: values1}, r >> k);
+    blurY({width: n, height: m, data: values1}, {width: n, height: m, data: values0}, r >> k);
+    blurX({width: n, height: m, data: values0}, {width: n, height: m, data: values1}, r >> k);
+    blurY({width: n, height: m, data: values1}, {width: n, height: m, data: values0}, r >> k);
 
-function set$2(object, f) {
-  var set = new Set;
+    var tz = threshold$$1(values0);
 
-  // Copy constructor.
-  if (object instanceof Set) object.each(function(value) { set.add(value); });
+    // Convert number of thresholds into uniform thresholds.
+    if (!Array.isArray(tz)) {
+      var stop = max(values0);
+      tz = tickStep(0, stop, tz);
+      tz = sequence(0, Math.floor(stop / tz) * tz, tz);
+      tz.shift();
+    }
 
-  // Otherwise, assume it’s an array.
-  else if (object) {
-    var i = -1, n = object.length;
-    if (f == null) while (++i < n) set.add(object[i]);
-    else while (++i < n) set.add(f(object[i], i, object));
+    return contours()
+        .thresholds(tz)
+        .size([n, m])
+      (values0)
+        .map(transform);
   }
 
-  return set;
-}
+  function transform(geometry) {
+    geometry.value *= Math.pow(2, -2 * k); // Density in points per square pixel.
+    geometry.coordinates.forEach(transformPolygon);
+    return geometry;
+  }
 
-var keys = function(map) {
-  var keys = [];
-  for (var key in map) keys.push(key);
-  return keys;
-};
+  function transformPolygon(coordinates) {
+    coordinates.forEach(transformRing);
+  }
 
-var values = function(map) {
-  var values = [];
-  for (var key in map) values.push(map[key]);
-  return values;
-};
+  function transformRing(coordinates) {
+    coordinates.forEach(transformPoint);
+  }
 
-var entries = function(map) {
-  var entries = [];
-  for (var key in map) entries.push({key: key, value: map[key]});
-  return entries;
-};
+  // TODO Optimize.
+  function transformPoint(coordinates) {
+    coordinates[0] = coordinates[0] * Math.pow(2, k) - o;
+    coordinates[1] = coordinates[1] * Math.pow(2, k) - o;
+  }
+
+  function resize() {
+    o = r * 3;
+    n = (dx + o * 2) >> k;
+    m = (dy + o * 2) >> k;
+    return density;
+  }
+
+  density.x = function(_) {
+    return arguments.length ? (x = typeof _ === "function" ? _ : constant$6(+_), density) : x;
+  };
+
+  density.y = function(_) {
+    return arguments.length ? (y = typeof _ === "function" ? _ : constant$6(+_), density) : y;
+  };
+
+  density.weight = function(_) {
+    return arguments.length ? (weight = typeof _ === "function" ? _ : constant$6(+_), density) : weight;
+  };
+
+  density.size = function(_) {
+    if (!arguments.length) return [dx, dy];
+    var _0 = Math.ceil(_[0]), _1 = Math.ceil(_[1]);
+    if (!(_0 >= 0) && !(_0 >= 0)) throw new Error("invalid size");
+    return dx = _0, dy = _1, resize();
+  };
+
+  density.cellSize = function(_) {
+    if (!arguments.length) return 1 << k;
+    if (!((_ = +_) >= 1)) throw new Error("invalid cell size");
+    return k = Math.floor(Math.log(_) / Math.LN2), resize();
+  };
+
+  density.thresholds = function(_) {
+    return arguments.length ? (threshold$$1 = typeof _ === "function" ? _ : Array.isArray(_) ? constant$6(slice$3.call(_)) : constant$6(_), density) : threshold$$1;
+  };
+
+  density.bandwidth = function(_) {
+    if (!arguments.length) return Math.sqrt(r * (r + 1));
+    if (!((_ = +_) >= 0)) throw new Error("invalid bandwidth");
+    return r = Math.round((Math.sqrt(4 * _ * _ + 1) - 1) / 2), resize();
+  };
 
-var EOL = {};
-var EOF = {};
-var QUOTE = 34;
-var NEWLINE = 10;
-var RETURN = 13;
+  return density;
+}
+
+var EOL = {},
+    EOF = {},
+    QUOTE = 34,
+    NEWLINE = 10,
+    RETURN = 13;
 
 function objectConverter(columns) {
   return new Function("d", "return {" + columns.map(function(name, i) {
@@ -5252,7 +5735,7 @@ function inferColumns(rows) {
   return columns;
 }
 
-var dsv = function(delimiter) {
+function dsvFormat(delimiter) {
   var reFormat = new RegExp("[\"" + delimiter + "\n\r]"),
       DELIMITER = delimiter.charCodeAt(0);
 
@@ -5343,23 +5826,103 @@ var dsv = function(delimiter) {
     format: format,
     formatRows: formatRows
   };
-};
+}
 
-var csv = dsv(",");
+var csv = dsvFormat(",");
 
 var csvParse = csv.parse;
 var csvParseRows = csv.parseRows;
 var csvFormat = csv.format;
 var csvFormatRows = csv.formatRows;
 
-var tsv = dsv("\t");
+var tsv = dsvFormat("\t");
 
 var tsvParse = tsv.parse;
 var tsvParseRows = tsv.parseRows;
 var tsvFormat = tsv.format;
 var tsvFormatRows = tsv.formatRows;
 
-var center$1 = function(x, y) {
+function responseBlob(response) {
+  if (!response.ok) throw new Error(response.status + " " + response.statusText);
+  return response.blob();
+}
+
+function blob(input, init) {
+  return fetch(input, init).then(responseBlob);
+}
+
+function responseArrayBuffer(response) {
+  if (!response.ok) throw new Error(response.status + " " + response.statusText);
+  return response.arrayBuffer();
+}
+
+function buffer(input, init) {
+  return fetch(input, init).then(responseArrayBuffer);
+}
+
+function responseText(response) {
+  if (!response.ok) throw new Error(response.status + " " + response.statusText);
+  return response.text();
+}
+
+function text(input, init) {
+  return fetch(input, init).then(responseText);
+}
+
+function dsvParse(parse) {
+  return function(input, init, row) {
+    if (arguments.length === 2 && typeof init === "function") row = init, init = undefined;
+    return text(input, init).then(function(response) {
+      return parse(response, row);
+    });
+  };
+}
+
+function dsv(delimiter, input, init, row) {
+  if (arguments.length === 3 && typeof init === "function") row = init, init = undefined;
+  var format = dsvFormat(delimiter);
+  return text(input, init).then(function(response) {
+    return format.parse(response, row);
+  });
+}
+
+var csv$1 = dsvParse(csvParse);
+var tsv$1 = dsvParse(tsvParse);
+
+function image(input, init) {
+  return new Promise(function(resolve, reject) {
+    var image = new Image;
+    for (var key in init) image[key] = init[key];
+    image.onerror = reject;
+    image.onload = function() { resolve(image); };
+    image.src = input;
+  });
+}
+
+function responseJson(response) {
+  if (!response.ok) throw new Error(response.status + " " + response.statusText);
+  return response.json();
+}
+
+function json(input, init) {
+  return fetch(input, init).then(responseJson);
+}
+
+function parser(type) {
+  return function(input, init)  {
+    return text(input, init).then(function(text$$1) {
+      return (new DOMParser).parseFromString(text$$1, type);
+    });
+  };
+}
+
+var xml = parser("application/xml");
+
+var html = parser("text/html");
+
+var svg = parser("image/svg+xml");
+
+function center$1(x, y) {
   var nodes;
 
   if (x == null) x = 0;
@@ -5394,23 +5957,23 @@ var center$1 = function(x, y) {
   };
 
   return force;
-};
+}
 
-var constant$6 = function(x) {
+function constant$7(x) {
   return function() {
     return x;
   };
-};
+}
 
-var jiggle = function() {
+function jiggle() {
   return (Math.random() - 0.5) * 1e-6;
-};
+}
 
-var tree_add = function(d) {
+function tree_add(d) {
   var x = +this._x.call(null, d),
       y = +this._y.call(null, d);
   return add(this.cover(x, y), x, y, d);
-};
+}
 
 function add(tree, x, y, d) {
   if (isNaN(x) || isNaN(y)) return tree; // ignore invalid points
@@ -5492,7 +6055,7 @@ function addAll(data) {
   return this;
 }
 
-var tree_cover = function(x, y) {
+function tree_cover(x, y) {
   if (isNaN(x = +x) || isNaN(y = +y)) return this; // ignore invalid points
 
   var x0 = this._x0,
@@ -5549,31 +6112,31 @@ var tree_cover = function(x, y) {
   this._x1 = x1;
   this._y1 = y1;
   return this;
-};
+}
 
-var tree_data = function() {
+function tree_data() {
   var data = [];
   this.visit(function(node) {
     if (!node.length) do data.push(node.data); while (node = node.next)
   });
   return data;
-};
+}
 
-var tree_extent = function(_) {
+function tree_extent(_) {
   return arguments.length
       ? this.cover(+_[0][0], +_[0][1]).cover(+_[1][0], +_[1][1])
       : isNaN(this._x0) ? undefined : [[this._x0, this._y0], [this._x1, this._y1]];
-};
+}
 
-var Quad = function(node, x0, y0, x1, y1) {
+function Quad(node, x0, y0, x1, y1) {
   this.node = node;
   this.x0 = x0;
   this.y0 = y0;
   this.x1 = x1;
   this.y1 = y1;
-};
+}
 
-var tree_find = function(x, y, radius) {
+function tree_find(x, y, radius) {
   var data,
       x0 = this._x0,
       y0 = this._y0,
@@ -5640,9 +6203,9 @@ var tree_find = function(x, y, radius) {
   }
 
   return data;
-};
+}
 
-var tree_remove = function(d) {
+function tree_remove(d) {
   if (isNaN(x = +this._x.call(null, d)) || isNaN(y = +this._y.call(null, d))) return this; // ignore invalid points
 
   var parent,
@@ -5681,7 +6244,7 @@ var tree_remove = function(d) {
   if (next = node.next) delete node.next;
 
   // If there are multiple coincident points, remove just the point.
-  if (previous) return next ? previous.next = next : delete previous.next, this;
+  if (previous) return (next ? previous.next = next : delete previous.next), this;
 
   // If this is the root point, remove it.
   if (!parent) return this._root = next, this;
@@ -5698,26 +6261,26 @@ var tree_remove = function(d) {
   }
 
   return this;
-};
+}
 
 function removeAll(data) {
   for (var i = 0, n = data.length; i < n; ++i) this.remove(data[i]);
   return this;
 }
 
-var tree_root = function() {
+function tree_root() {
   return this._root;
-};
+}
 
-var tree_size = function() {
+function tree_size() {
   var size = 0;
   this.visit(function(node) {
     if (!node.length) do ++size; while (node = node.next)
   });
   return size;
-};
+}
 
-var tree_visit = function(callback) {
+function tree_visit(callback) {
   var quads = [], q, node = this._root, child, x0, y0, x1, y1;
   if (node) quads.push(new Quad(node, this._x0, this._y0, this._x1, this._y1));
   while (q = quads.pop()) {
@@ -5730,9 +6293,9 @@ var tree_visit = function(callback) {
     }
   }
   return this;
-};
+}
 
-var tree_visitAfter = function(callback) {
+function tree_visitAfter(callback) {
   var quads = [], next = [], q;
   if (this._root) quads.push(new Quad(this._root, this._x0, this._y0, this._x1, this._y1));
   while (q = quads.pop()) {
@@ -5750,26 +6313,26 @@ var tree_visitAfter = function(callback) {
     callback(q.node, q.x0, q.y0, q.x1, q.y1);
   }
   return this;
-};
+}
 
-function defaultX(d) {
+function defaultX$1(d) {
   return d[0];
 }
 
-var tree_x = function(_) {
+function tree_x(_) {
   return arguments.length ? (this._x = _, this) : this._x;
-};
+}
 
-function defaultY(d) {
+function defaultY$1(d) {
   return d[1];
 }
 
-var tree_y = function(_) {
+function tree_y(_) {
   return arguments.length ? (this._y = _, this) : this._y;
-};
+}
 
 function quadtree(nodes, x, y) {
-  var tree = new Quadtree(x == null ? defaultX : x, y == null ? defaultY : y, NaN, NaN, NaN, NaN);
+  var tree = new Quadtree(x == null ? defaultX$1 : x, y == null ? defaultY$1 : y, NaN, NaN, NaN, NaN);
   return nodes == null ? tree : tree.addAll(nodes);
 }
 
@@ -5837,13 +6400,13 @@ function y(d) {
   return d.y + d.vy;
 }
 
-var collide = function(radius) {
+function collide(radius) {
   var nodes,
       radii,
       strength = 1,
       iterations = 1;
 
-  if (typeof radius !== "function") radius = constant$6(radius == null ? 1 : +radius);
+  if (typeof radius !== "function") radius = constant$7(radius == null ? 1 : +radius);
 
   function force() {
     var i, n = nodes.length,
@@ -5918,11 +6481,11 @@ var collide = function(radius) {
   };
 
   force.radius = function(_) {
-    return arguments.length ? (radius = typeof _ === "function" ? _ : constant$6(+_), initialize(), force) : radius;
+    return arguments.length ? (radius = typeof _ === "function" ? _ : constant$7(+_), initialize(), force) : radius;
   };
 
   return force;
-};
+}
 
 function index(d) {
   return d.index;
@@ -5934,11 +6497,11 @@ function find(nodeById, nodeId) {
   return node;
 }
 
-var link = function(links) {
+function link(links) {
   var id = index,
       strength = defaultStrength,
       strengths,
-      distance = constant$6(30),
+      distance = constant$7(30),
       distances,
       nodes,
       count,
@@ -6027,15 +6590,15 @@ var link = function(links) {
   };
 
   force.strength = function(_) {
-    return arguments.length ? (strength = typeof _ === "function" ? _ : constant$6(+_), initializeStrength(), force) : strength;
+    return arguments.length ? (strength = typeof _ === "function" ? _ : constant$7(+_), initializeStrength(), force) : strength;
   };
 
   force.distance = function(_) {
-    return arguments.length ? (distance = typeof _ === "function" ? _ : constant$6(+_), initializeDistance(), force) : distance;
+    return arguments.length ? (distance = typeof _ === "function" ? _ : constant$7(+_), initializeDistance(), force) : distance;
   };
 
   return force;
-};
+}
 
 function x$1(d) {
   return d.x;
@@ -6045,10 +6608,10 @@ function y$1(d) {
   return d.y;
 }
 
-var initialRadius = 10;
-var initialAngle = Math.PI * (3 - Math.sqrt(5));
+var initialRadius = 10,
+    initialAngle = Math.PI * (3 - Math.sqrt(5));
 
-var simulation = function(nodes) {
+function simulation(nodes) {
   var simulation,
       alpha = 1,
       alphaMin = 0.001,
@@ -6145,7 +6708,7 @@ var simulation = function(nodes) {
     },
 
     force: function(name, _) {
-      return arguments.length > 1 ? (_ == null ? forces.remove(name) : forces.set(name, initializeForce(_)), simulation) : forces.get(name);
+      return arguments.length > 1 ? ((_ == null ? forces.remove(name) : forces.set(name, initializeForce(_))), simulation) : forces.get(name);
     },
 
     find: function(x, y, radius) {
@@ -6175,13 +6738,13 @@ var simulation = function(nodes) {
       return arguments.length > 1 ? (event.on(name, _), simulation) : event.on(name);
     }
   };
-};
+}
 
-var manyBody = function() {
+function manyBody() {
   var nodes,
       node,
       alpha,
-      strength = constant$6(-30),
+      strength = constant$7(-30),
       strengths,
       distanceMin2 = 1,
       distanceMax2 = Infinity,
@@ -6269,7 +6832,7 @@ var manyBody = function() {
   };
 
   force.strength = function(_) {
-    return arguments.length ? (strength = typeof _ === "function" ? _ : constant$6(+_), initialize(), force) : strength;
+    return arguments.length ? (strength = typeof _ === "function" ? _ : constant$7(+_), initialize(), force) : strength;
   };
 
   force.distanceMin = function(_) {
@@ -6285,15 +6848,15 @@ var manyBody = function() {
   };
 
   return force;
-};
+}
 
-var radial = function(radius, x, y) {
+function radial(radius, x, y) {
   var nodes,
-      strength = constant$6(0.1),
+      strength = constant$7(0.1),
       strengths,
       radiuses;
 
-  if (typeof radius !== "function") radius = constant$6(+radius);
+  if (typeof radius !== "function") radius = constant$7(+radius);
   if (x == null) x = 0;
   if (y == null) y = 0;
 
@@ -6325,11 +6888,11 @@ var radial = function(radius, x, y) {
   };
 
   force.strength = function(_) {
-    return arguments.length ? (strength = typeof _ === "function" ? _ : constant$6(+_), initialize(), force) : strength;
+    return arguments.length ? (strength = typeof _ === "function" ? _ : constant$7(+_), initialize(), force) : strength;
   };
 
   force.radius = function(_) {
-    return arguments.length ? (radius = typeof _ === "function" ? _ : constant$6(+_), initialize(), force) : radius;
+    return arguments.length ? (radius = typeof _ === "function" ? _ : constant$7(+_), initialize(), force) : radius;
   };
 
   force.x = function(_) {
@@ -6341,15 +6904,15 @@ var radial = function(radius, x, y) {
   };
 
   return force;
-};
+}
 
-var x$2 = function(x) {
-  var strength = constant$6(0.1),
+function x$2(x) {
+  var strength = constant$7(0.1),
       nodes,
       strengths,
       xz;
 
-  if (typeof x !== "function") x = constant$6(x == null ? 0 : +x);
+  if (typeof x !== "function") x = constant$7(x == null ? 0 : +x);
 
   function force(alpha) {
     for (var i = 0, n = nodes.length, node; i < n; ++i) {
@@ -6373,23 +6936,23 @@ var x$2 = function(x) {
   };
 
   force.strength = function(_) {
-    return arguments.length ? (strength = typeof _ === "function" ? _ : constant$6(+_), initialize(), force) : strength;
+    return arguments.length ? (strength = typeof _ === "function" ? _ : constant$7(+_), initialize(), force) : strength;
   };
 
   force.x = function(_) {
-    return arguments.length ? (x = typeof _ === "function" ? _ : constant$6(+_), initialize(), force) : x;
+    return arguments.length ? (x = typeof _ === "function" ? _ : constant$7(+_), initialize(), force) : x;
   };
 
   return force;
-};
+}
 
-var y$2 = function(y) {
-  var strength = constant$6(0.1),
+function y$2(y) {
+  var strength = constant$7(0.1),
       nodes,
       strengths,
       yz;
 
-  if (typeof y !== "function") y = constant$6(y == null ? 0 : +y);
+  if (typeof y !== "function") y = constant$7(y == null ? 0 : +y);
 
   function force(alpha) {
     for (var i = 0, n = nodes.length, node; i < n; ++i) {
@@ -6413,20 +6976,20 @@ var y$2 = function(y) {
   };
 
   force.strength = function(_) {
-    return arguments.length ? (strength = typeof _ === "function" ? _ : constant$6(+_), initialize(), force) : strength;
+    return arguments.length ? (strength = typeof _ === "function" ? _ : constant$7(+_), initialize(), force) : strength;
   };
 
   force.y = function(_) {
-    return arguments.length ? (y = typeof _ === "function" ? _ : constant$6(+_), initialize(), force) : y;
+    return arguments.length ? (y = typeof _ === "function" ? _ : constant$7(+_), initialize(), force) : y;
   };
 
   return force;
-};
+}
 
 // Computes the decimal coefficient and exponent of the specified number x with
 // significant digits p, where x is positive and p is in [1, 21] or undefined.
 // For example, formatDecimal(1.23) returns ["123", 0].
-var formatDecimal = function(x, p) {
+function formatDecimal(x, p) {
   if ((i = (x = p ? x.toExponential(p - 1) : x.toExponential()).indexOf("e")) < 0) return null; // NaN, ±Infinity
   var i, coefficient = x.slice(0, i);
 
@@ -6436,13 +6999,13 @@ var formatDecimal = function(x, p) {
     coefficient.length > 1 ? coefficient[0] + coefficient.slice(2) : coefficient,
     +x.slice(i + 1)
   ];
-};
+}
 
-var exponent$1 = function(x) {
+function exponent$1(x) {
   return x = formatDecimal(Math.abs(x)), x ? x[1] : NaN;
-};
+}
 
-var formatGroup = function(grouping, thousands) {
+function formatGroup(grouping, thousands) {
   return function(value, width) {
     var i = value.length,
         t = [],
@@ -6459,34 +7022,68 @@ var formatGroup = function(grouping, thousands) {
 
     return t.reverse().join(thousands);
   };
-};
+}
 
-var formatNumerals = function(numerals) {
+function formatNumerals(numerals) {
   return function(value) {
     return value.replace(/[0-9]/g, function(i) {
       return numerals[+i];
     });
   };
-};
+}
+
+// [[fill]align][sign][symbol][0][width][,][.precision][~][type]
+var re = /^(?:(.)?([<>=^]))?([+\-( ])?([$#])?(0)?(\d+)?(,)?(\.\d+)?(~)?([a-z%])?$/i;
+
+function formatSpecifier(specifier) {
+  return new FormatSpecifier(specifier);
+}
+
+formatSpecifier.prototype = FormatSpecifier.prototype; // instanceof
+
+function FormatSpecifier(specifier) {
+  if (!(match = re.exec(specifier))) throw new Error("invalid format: " + specifier);
+  var match;
+  this.fill = match[1] || " ";
+  this.align = match[2] || ">";
+  this.sign = match[3] || "-";
+  this.symbol = match[4] || "";
+  this.zero = !!match[5];
+  this.width = match[6] && +match[6];
+  this.comma = !!match[7];
+  this.precision = match[8] && +match[8].slice(1);
+  this.trim = !!match[9];
+  this.type = match[10] || "";
+}
 
-var formatDefault = function(x, p) {
-  x = x.toPrecision(p);
+FormatSpecifier.prototype.toString = function() {
+  return this.fill
+      + this.align
+      + this.sign
+      + this.symbol
+      + (this.zero ? "0" : "")
+      + (this.width == null ? "" : Math.max(1, this.width | 0))
+      + (this.comma ? "," : "")
+      + (this.precision == null ? "" : "." + Math.max(0, this.precision | 0))
+      + (this.trim ? "~" : "")
+      + this.type;
+};
 
-  out: for (var n = x.length, i = 1, i0 = -1, i1; i < n; ++i) {
-    switch (x[i]) {
+// Trims insignificant zeros, e.g., replaces 1.2000k with 1.2k.
+function formatTrim(s) {
+  out: for (var n = s.length, i = 1, i0 = -1, i1; i < n; ++i) {
+    switch (s[i]) {
       case ".": i0 = i1 = i; break;
       case "0": if (i0 === 0) i0 = i; i1 = i; break;
-      case "e": break out;
-      default: if (i0 > 0) i0 = 0; break;
+      default: if (i0 > 0) { if (!+s[i]) break out; i0 = 0; } break;
     }
   }
-
-  return i0 > 0 ? x.slice(0, i0) + x.slice(i1 + 1) : x;
-};
+  return i0 > 0 ? s.slice(0, i0) + s.slice(i1 + 1) : s;
+}
 
 var prefixExponent;
 
-var formatPrefixAuto = function(x, p) {
+function formatPrefixAuto(x, p) {
   var d = formatDecimal(x, p);
   if (!d) return x + "";
   var coefficient = d[0],
@@ -6497,9 +7094,9 @@ var formatPrefixAuto = function(x, p) {
       : i > n ? coefficient + new Array(i - n + 1).join("0")
       : i > 0 ? coefficient.slice(0, i) + "." + coefficient.slice(i)
       : "0." + new Array(1 - i).join("0") + formatDecimal(x, Math.max(0, p + i - 1))[0]; // less than 1y!
-};
+}
 
-var formatRounded = function(x, p) {
+function formatRounded(x, p) {
   var d = formatDecimal(x, p);
   if (!d) return x + "";
   var coefficient = d[0],
@@ -6507,10 +7104,9 @@ var formatRounded = function(x, p) {
   return exponent < 0 ? "0." + new Array(-exponent).join("0") + coefficient
       : coefficient.length > exponent + 1 ? coefficient.slice(0, exponent + 1) + "." + coefficient.slice(exponent + 1)
       : coefficient + new Array(exponent - coefficient.length + 2).join("0");
-};
+}
 
 var formatTypes = {
-  "": formatDefault,
   "%": function(x, p) { return (x * 100).toFixed(p); },
   "b": function(x) { return Math.round(x).toString(2); },
   "c": function(x) { return x + ""; },
@@ -6526,68 +7122,13 @@ var formatTypes = {
   "x": function(x) { return Math.round(x).toString(16); }
 };
 
-// [[fill]align][sign][symbol][0][width][,][.precision][type]
-var re = /^(?:(.)?([<>=^]))?([+\-\( ])?([$#])?(0)?(\d+)?(,)?(\.\d+)?([a-z%])?$/i;
-
-function formatSpecifier(specifier) {
-  return new FormatSpecifier(specifier);
-}
-
-formatSpecifier.prototype = FormatSpecifier.prototype; // instanceof
-
-function FormatSpecifier(specifier) {
-  if (!(match = re.exec(specifier))) throw new Error("invalid format: " + specifier);
-
-  var match,
-      fill = match[1] || " ",
-      align = match[2] || ">",
-      sign = match[3] || "-",
-      symbol = match[4] || "",
-      zero = !!match[5],
-      width = match[6] && +match[6],
-      comma = !!match[7],
-      precision = match[8] && +match[8].slice(1),
-      type = match[9] || "";
-
-  // The "n" type is an alias for ",g".
-  if (type === "n") comma = true, type = "g";
-
-  // Map invalid types to the default format.
-  else if (!formatTypes[type]) type = "";
-
-  // If zero fill is specified, padding goes after sign and before digits.
-  if (zero || (fill === "0" && align === "=")) zero = true, fill = "0", align = "=";
-
-  this.fill = fill;
-  this.align = align;
-  this.sign = sign;
-  this.symbol = symbol;
-  this.zero = zero;
-  this.width = width;
-  this.comma = comma;
-  this.precision = precision;
-  this.type = type;
-}
-
-FormatSpecifier.prototype.toString = function() {
-  return this.fill
-      + this.align
-      + this.sign
-      + this.symbol
-      + (this.zero ? "0" : "")
-      + (this.width == null ? "" : Math.max(1, this.width | 0))
-      + (this.comma ? "," : "")
-      + (this.precision == null ? "" : "." + Math.max(0, this.precision | 0))
-      + this.type;
-};
-
-var identity$3 = function(x) {
+function identity$3(x) {
   return x;
-};
+}
 
 var prefixes = ["y","z","a","f","p","n","\xB5","m","","k","M","G","T","P","E","Z","Y"];
 
-var formatLocale = function(locale) {
+function formatLocale(locale) {
   var group = locale.grouping && locale.thousands ? formatGroup(locale.grouping, locale.thousands) : identity$3,
       currency = locale.currency,
       decimal = locale.decimal,
@@ -6605,8 +7146,18 @@ var formatLocale = function(locale) {
         width = specifier.width,
         comma = specifier.comma,
         precision = specifier.precision,
+        trim = specifier.trim,
         type = specifier.type;
 
+    // The "n" type is an alias for ",g".
+    if (type === "n") comma = true, type = "g";
+
+    // The "" type, and any invalid type, is an alias for ".12~g".
+    else if (!formatTypes[type]) precision == null && (precision = 12), trim = true, type = "g";
+
+    // If zero fill is specified, padding goes after sign and before digits.
+    if (zero || (fill === "0" && align === "=")) zero = true, fill = "0", align = "=";
+
     // Compute the prefix and suffix.
     // For SI-prefix, the suffix is lazily computed.
     var prefix = symbol === "$" ? currency[0] : symbol === "#" && /[boxX]/.test(type) ? "0" + type.toLowerCase() : "",
@@ -6616,13 +7167,13 @@ var formatLocale = function(locale) {
     // Is this an integer type?
     // Can this type generate exponential notation?
     var formatType = formatTypes[type],
-        maybeSuffix = !type || /[defgprs%]/.test(type);
+        maybeSuffix = /[defgprs%]/.test(type);
 
     // Set the default precision if not specified,
     // or clamp the specified precision to the supported range.
     // For significant precision, it must be in [1, 21].
     // For fixed precision, it must be in [0, 20].
-    precision = precision == null ? (type ? 6 : 12)
+    precision = precision == null ? 6
         : /[gprs]/.test(type) ? Math.max(1, Math.min(21, precision))
         : Math.max(0, Math.min(20, precision));
 
@@ -6641,12 +7192,15 @@ var formatLocale = function(locale) {
         var valueNegative = value < 0;
         value = formatType(Math.abs(value), precision);
 
+        // Trim insignificant zeros.
+        if (trim) value = formatTrim(value);
+
         // If a negative value rounds to zero during formatting, treat as positive.
         if (valueNegative && +value === 0) valueNegative = false;
 
         // Compute the prefix and suffix.
         valuePrefix = (valueNegative ? (sign === "(" ? sign : "-") : sign === "-" || sign === "(" ? "" : sign) + valuePrefix;
-        valueSuffix = valueSuffix + (type === "s" ? prefixes[8 + prefixExponent / 3] : "") + (valueNegative && sign === "(" ? ")" : "");
+        valueSuffix = (type === "s" ? prefixes[8 + prefixExponent / 3] : "") + valueSuffix + (valueNegative && sign === "(" ? ")" : "");
 
         // Break the formatted value into the integer “value” part that can be
         // grouped, and fractional or exponential “suffix” part that is not.
@@ -6704,12 +7258,10 @@ var formatLocale = function(locale) {
     format: newFormat,
     formatPrefix: formatPrefix
   };
-};
+}
 
 var locale;
 
-
-
 defaultLocale({
   decimal: ".",
   thousands: ",",
@@ -6724,18 +7276,18 @@ function defaultLocale(definition) {
   return locale;
 }
 
-var precisionFixed = function(step) {
+function precisionFixed(step) {
   return Math.max(0, -exponent$1(Math.abs(step)));
-};
+}
 
-var precisionPrefix = function(step, value) {
+function precisionPrefix(step, value) {
   return Math.max(0, Math.max(-8, Math.min(8, Math.floor(exponent$1(value) / 3))) * 3 - exponent$1(Math.abs(step)));
-};
+}
 
-var precisionRound = function(step, max) {
+function precisionRound(step, max) {
   step = Math.abs(step), max = Math.abs(max) - step;
   return Math.max(0, exponent$1(max) - exponent$1(step)) + 1;
-};
+}
 
 // Adds floating point numbers with twice the normal precision.
 // Reference: J. R. Shewchuk, Adaptive Precision Floating-Point Arithmetic and
@@ -6744,9 +7296,9 @@ var precisionRound = function(step, max) {
 // Code adapted from GeographicLib by Charles F. F. Karney,
 // http://geographiclib.sourceforge.net/
 
-var adder = function() {
+function adder() {
   return new Adder;
-};
+}
 
 function Adder() {
   this.reset();
@@ -6794,7 +7346,6 @@ var atan2 = Math.atan2;
 var cos$1 = Math.cos;
 var ceil = Math.ceil;
 var exp = Math.exp;
-
 var log = Math.log;
 var pow = Math.pow;
 var sin$1 = Math.sin;
@@ -6814,7 +7365,7 @@ function haversin(x) {
   return (x = sin$1(x / 2)) * x;
 }
 
-function noop$1() {}
+function noop$2() {}
 
 function streamGeometry(geometry, stream) {
   if (geometry && streamGeometryType.hasOwnProperty(geometry.type)) {
@@ -6878,27 +7429,27 @@ function streamPolygon(coordinates, stream) {
   stream.polygonEnd();
 }
 
-var geoStream = function(object, stream) {
+function geoStream(object, stream) {
   if (object && streamObjectType.hasOwnProperty(object.type)) {
     streamObjectType[object.type](object, stream);
   } else {
     streamGeometry(object, stream);
   }
-};
+}
 
 var areaRingSum = adder();
 
-var areaSum = adder();
-var lambda00;
-var phi00;
-var lambda0;
-var cosPhi0;
-var sinPhi0;
+var areaSum = adder(),
+    lambda00,
+    phi00,
+    lambda0,
+    cosPhi0,
+    sinPhi0;
 
 var areaStream = {
-  point: noop$1,
-  lineStart: noop$1,
-  lineEnd: noop$1,
+  point: noop$2,
+  lineStart: noop$2,
+  lineEnd: noop$2,
   polygonStart: function() {
     areaRingSum.reset();
     areaStream.lineStart = areaRingStart;
@@ -6907,7 +7458,7 @@ var areaStream = {
   polygonEnd: function() {
     var areaRing = +areaRingSum;
     areaSum.add(areaRing < 0 ? tau$3 + areaRing : areaRing);
-    this.lineStart = this.lineEnd = this.point = noop$1;
+    this.lineStart = this.lineEnd = this.point = noop$2;
   },
   sphere: function() {
     areaSum.add(tau$3);
@@ -6950,11 +7501,11 @@ function areaPoint(lambda, phi) {
   lambda0 = lambda, cosPhi0 = cosPhi, sinPhi0 = sinPhi;
 }
 
-var area = function(object) {
+function area$1(object) {
   areaSum.reset();
   geoStream(object, areaStream);
   return areaSum * 2;
-};
+}
 
 function spherical(cartesian) {
   return [atan2(cartesian[1], cartesian[0]), asin(cartesian[2])];
@@ -6988,17 +7539,13 @@ function cartesianNormalizeInPlace(d) {
   d[0] /= l, d[1] /= l, d[2] /= l;
 }
 
-var lambda0$1;
-var phi0;
-var lambda1;
-var phi1;
-var lambda2;
-var lambda00$1;
-var phi00$1;
-var p0;
-var deltaSum = adder();
-var ranges;
-var range;
+var lambda0$1, phi0, lambda1, phi1, // bounds
+    lambda2, // previous lambda-coordinate
+    lambda00$1, phi00$1, // first point
+    p0, // previous 3D point
+    deltaSum = adder(),
+    ranges,
+    range;
 
 var boundsStream = {
   point: boundsPoint,
@@ -7126,7 +7673,7 @@ function rangeContains(range, x) {
   return range[0] <= range[1] ? range[0] <= x && x <= range[1] : x < range[0] || range[1] < x;
 }
 
-var bounds = function(feature) {
+function bounds(feature) {
   var i, n, a, b, merged, deltaMax, delta;
 
   phi1 = lambda1 = -(lambda0$1 = phi0 = Infinity);
@@ -7161,27 +7708,17 @@ var bounds = function(feature) {
   return lambda0$1 === Infinity || phi0 === Infinity
       ? [[NaN, NaN], [NaN, NaN]]
       : [[lambda0$1, phi0], [lambda1, phi1]];
-};
+}
 
-var W0;
-var W1;
-var X0;
-var Y0;
-var Z0;
-var X1;
-var Y1;
-var Z1;
-var X2;
-var Y2;
-var Z2;
-var lambda00$2;
-var phi00$2;
-var x0;
-var y0;
-var z0; // previous point
+var W0, W1,
+    X0, Y0, Z0,
+    X1, Y1, Z1,
+    X2, Y2, Z2,
+    lambda00$2, phi00$2, // first point
+    x0, y0, z0; // previous point
 
 var centroidStream = {
-  sphere: noop$1,
+  sphere: noop$2,
   point: centroidPoint,
   lineStart: centroidLineStart,
   lineEnd: centroidLineEnd,
@@ -7285,7 +7822,7 @@ function centroidRingPoint(lambda, phi) {
   centroidPointCartesian(x0, y0, z0);
 }
 
-var centroid = function(object) {
+function centroid(object) {
   W0 = W1 =
   X0 = Y0 = Z0 =
   X1 = Y1 = Z1 =
@@ -7308,15 +7845,15 @@ var centroid = function(object) {
   }
 
   return [atan2(y, x) * degrees$1, asin(z / sqrt(m)) * degrees$1];
-};
+}
 
-var constant$7 = function(x) {
+function constant$8(x) {
   return function() {
     return x;
   };
-};
+}
 
-var compose = function(a, b) {
+function compose(a, b) {
 
   function compose(x, y) {
     return x = a(x, y), b(x[0], x[1]);
@@ -7327,7 +7864,7 @@ var compose = function(a, b) {
   };
 
   return compose;
-};
+}
 
 function rotationIdentity(lambda, phi) {
   return [lambda > pi$3 ? lambda - tau$3 : lambda < -pi$3 ? lambda + tau$3 : lambda, phi];
@@ -7387,7 +7924,7 @@ function rotationPhiGamma(deltaPhi, deltaGamma) {
   return rotation;
 }
 
-var rotation = function(rotate) {
+function rotation(rotate) {
   rotate = rotateRadians(rotate[0] * radians, rotate[1] * radians, rotate.length > 2 ? rotate[2] * radians : 0);
 
   function forward(coordinates) {
@@ -7401,7 +7938,7 @@ var rotation = function(rotate) {
   };
 
   return forward;
-};
+}
 
 // Generates a circle centered at [0°, 0°], with a given radius and precision.
 function circleStream(stream, radius, delta, direction, t0, t1) {
@@ -7431,10 +7968,10 @@ function circleRadius(cosRadius, point) {
   return ((-point[2] < 0 ? -radius : radius) + tau$3 - epsilon$2) % tau$3;
 }
 
-var circle = function() {
-  var center = constant$7([0, 0]),
-      radius = constant$7(90),
-      precision = constant$7(6),
+function circle() {
+  var center = constant$8([0, 0]),
+      radius = constant$8(90),
+      precision = constant$8(6),
       ring,
       rotate,
       stream = {point: point};
@@ -7457,21 +7994,21 @@ var circle = function() {
   }
 
   circle.center = function(_) {
-    return arguments.length ? (center = typeof _ === "function" ? _ : constant$7([+_[0], +_[1]]), circle) : center;
+    return arguments.length ? (center = typeof _ === "function" ? _ : constant$8([+_[0], +_[1]]), circle) : center;
   };
 
   circle.radius = function(_) {
-    return arguments.length ? (radius = typeof _ === "function" ? _ : constant$7(+_), circle) : radius;
+    return arguments.length ? (radius = typeof _ === "function" ? _ : constant$8(+_), circle) : radius;
   };
 
   circle.precision = function(_) {
-    return arguments.length ? (precision = typeof _ === "function" ? _ : constant$7(+_), circle) : precision;
+    return arguments.length ? (precision = typeof _ === "function" ? _ : constant$8(+_), circle) : precision;
   };
 
   return circle;
-};
+}
 
-var clipBuffer = function() {
+function clipBuffer() {
   var lines = [],
       line;
   return {
@@ -7481,7 +8018,7 @@ var clipBuffer = function() {
     lineStart: function() {
       lines.push(line = []);
     },
-    lineEnd: noop$1,
+    lineEnd: noop$2,
     rejoin: function() {
       if (lines.length > 1) lines.push(lines.pop().concat(lines.shift()));
     },
@@ -7492,11 +8029,11 @@ var clipBuffer = function() {
       return result;
     }
   };
-};
+}
 
-var pointEqual = function(a, b) {
+function pointEqual(a, b) {
   return abs(a[0] - b[0]) < epsilon$2 && abs(a[1] - b[1]) < epsilon$2;
-};
+}
 
 function Intersection(point, points, other, entry) {
   this.x = point;
@@ -7510,7 +8047,7 @@ function Intersection(point, points, other, entry) {
 // A generalized polygon clipping algorithm: given a polygon that has been cut
 // into its visible line segments, and rejoins the segments by interpolating
 // along the clip edge.
-var clipRejoin = function(segments, compareIntersection, startInside, interpolate, stream) {
+function clipRejoin(segments, compareIntersection, startInside, interpolate, stream) {
   var subject = [],
       clip = [],
       i,
@@ -7581,7 +8118,7 @@ var clipRejoin = function(segments, compareIntersection, startInside, interpolat
     } while (!current.v);
     stream.lineEnd();
   }
-};
+}
 
 function link$1(array) {
   if (!(n = array.length)) return;
@@ -7600,15 +8137,19 @@ function link$1(array) {
 
 var sum$1 = adder();
 
-var polygonContains = function(polygon, point) {
+function polygonContains(polygon, point) {
   var lambda = point[0],
       phi = point[1],
+      sinPhi = sin$1(phi),
       normal = [sin$1(lambda), -cos$1(lambda), 0],
       angle = 0,
       winding = 0;
 
   sum$1.reset();
 
+  if (sinPhi === 1) phi = halfPi$2 + epsilon$2;
+  else if (sinPhi === -1) phi = -halfPi$2 - epsilon$2;
+
   for (var i = 0, n = polygon.length; i < n; ++i) {
     if (!(m = (ring = polygon[i]).length)) continue;
     var ring,
@@ -7661,9 +8202,9 @@ var polygonContains = function(polygon, point) {
   // same side as the South pole.
 
   return (angle < -epsilon$2 || angle < epsilon$2 && sum$1 < -epsilon$2) ^ (winding & 1);
-};
+}
 
-var clip = function(pointVisible, clipLine, interpolate, start) {
+function clip(pointVisible, clipLine, interpolate, start) {
   return function(sink) {
     var line = clipLine(sink),
         ringBuffer = clipBuffer(),
@@ -7776,7 +8317,7 @@ var clip = function(pointVisible, clipLine, interpolate, start) {
 
     return clip;
   };
-};
+}
 
 function validSegment(segment) {
   return segment.length > 1;
@@ -7879,7 +8420,7 @@ function clipAntimeridianInterpolate(from, to, direction, stream) {
   }
 }
 
-var clipCircle = function(radius) {
+function clipCircle(radius) {
   var cr = cos$1(radius),
       delta = 6 * radians,
       smallRadius = cr > 0,
@@ -8054,9 +8595,9 @@ var clipCircle = function(radius) {
   }
 
   return clip(visible, clipLine, interpolate, smallRadius ? [0, -radius] : [-pi$3, radius - pi$3]);
-};
+}
 
-var clipLine = function(a, b, x0, y0, x1, y1) {
+function clipLine(a, b, x0, y0, x1, y1) {
   var ax = a[0],
       ay = a[1],
       bx = b[0],
@@ -8114,10 +8655,9 @@ var clipLine = function(a, b, x0, y0, x1, y1) {
   if (t0 > 0) a[0] = ax + t0 * dx, a[1] = ay + t0 * dy;
   if (t1 < 1) b[0] = ax + t1 * dx, b[1] = ay + t1 * dy;
   return true;
-};
+}
 
-var clipMax = 1e9;
-var clipMin = -clipMax;
+var clipMax = 1e9, clipMin = -clipMax;
 
 // TODO Use d3-polygon’s polygonContains here for the ring check?
 // TODO Eliminate duplicate buffering in clipBuffer and polygon.push?
@@ -8280,7 +8820,7 @@ function clipRectangle(x0, y0, x1, y1) {
   };
 }
 
-var extent$1 = function() {
+function extent$1() {
   var x0 = 0,
       y0 = 0,
       x1 = 960,
@@ -8297,20 +8837,20 @@ var extent$1 = function() {
       return arguments.length ? (x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1], cache = cacheStream = null, clip) : [[x0, y0], [x1, y1]];
     }
   };
-};
+}
 
-var lengthSum = adder();
-var lambda0$2;
-var sinPhi0$1;
-var cosPhi0$1;
+var lengthSum = adder(),
+    lambda0$2,
+    sinPhi0$1,
+    cosPhi0$1;
 
 var lengthStream = {
-  sphere: noop$1,
-  point: noop$1,
+  sphere: noop$2,
+  point: noop$2,
   lineStart: lengthLineStart,
-  lineEnd: noop$1,
-  polygonStart: noop$1,
-  polygonEnd: noop$1
+  lineEnd: noop$2,
+  polygonStart: noop$2,
+  polygonEnd: noop$2
 };
 
 function lengthLineStart() {
@@ -8319,7 +8859,7 @@ function lengthLineStart() {
 }
 
 function lengthLineEnd() {
-  lengthStream.point = lengthStream.lineEnd = noop$1;
+  lengthStream.point = lengthStream.lineEnd = noop$2;
 }
 
 function lengthPointFirst(lambda, phi) {
@@ -8342,20 +8882,20 @@ function lengthPoint(lambda, phi) {
   lambda0$2 = lambda, sinPhi0$1 = sinPhi, cosPhi0$1 = cosPhi;
 }
 
-var length$1 = function(object) {
+function length$1(object) {
   lengthSum.reset();
   geoStream(object, lengthStream);
   return +lengthSum;
-};
+}
 
-var coordinates = [null, null];
-var object$1 = {type: "LineString", coordinates: coordinates};
+var coordinates = [null, null],
+    object$1 = {type: "LineString", coordinates: coordinates};
 
-var distance = function(a, b) {
+function distance(a, b) {
   coordinates[0] = a;
   coordinates[1] = b;
   return length$1(object$1);
-};
+}
 
 var containsObjectType = {
   Feature: function(object, point) {
@@ -8432,11 +8972,11 @@ function pointRadians(point) {
   return [point[0] * radians, point[1] * radians];
 }
 
-var contains = function(object, point) {
+function contains$1(object, point) {
   return (object && containsObjectType.hasOwnProperty(object.type)
       ? containsObjectType[object.type]
       : containsGeometry)(object, point);
-};
+}
 
 function graticuleX(y0, y1, dy) {
   var y = sequence(y0, y1 - epsilon$2, dy).concat(y1);
@@ -8541,7 +9081,7 @@ function graticule10() {
   return graticule()();
 }
 
-var interpolate$1 = function(a, b) {
+function interpolate$1(a, b) {
   var x0 = a[0] * radians,
       y0 = a[1] * radians,
       x1 = b[0] * radians,
@@ -8574,29 +9114,29 @@ var interpolate$1 = function(a, b) {
   interpolate.distance = d;
 
   return interpolate;
-};
+}
 
-var identity$4 = function(x) {
+function identity$4(x) {
   return x;
-};
+}
 
-var areaSum$1 = adder();
-var areaRingSum$1 = adder();
-var x00;
-var y00;
-var x0$1;
-var y0$1;
+var areaSum$1 = adder(),
+    areaRingSum$1 = adder(),
+    x00,
+    y00,
+    x0$1,
+    y0$1;
 
 var areaStream$1 = {
-  point: noop$1,
-  lineStart: noop$1,
-  lineEnd: noop$1,
+  point: noop$2,
+  lineStart: noop$2,
+  lineEnd: noop$2,
   polygonStart: function() {
     areaStream$1.lineStart = areaRingStart$1;
     areaStream$1.lineEnd = areaRingEnd$1;
   },
   polygonEnd: function() {
-    areaStream$1.lineStart = areaStream$1.lineEnd = areaStream$1.point = noop$1;
+    areaStream$1.lineStart = areaStream$1.lineEnd = areaStream$1.point = noop$2;
     areaSum$1.add(abs(areaRingSum$1));
     areaRingSum$1.reset();
   },
@@ -8625,17 +9165,17 @@ function areaRingEnd$1() {
   areaPoint$1(x00, y00);
 }
 
-var x0$2 = Infinity;
-var y0$2 = x0$2;
-var x1 = -x0$2;
-var y1 = x1;
+var x0$2 = Infinity,
+    y0$2 = x0$2,
+    x1 = -x0$2,
+    y1 = x1;
 
 var boundsStream$1 = {
   point: boundsPoint$1,
-  lineStart: noop$1,
-  lineEnd: noop$1,
-  polygonStart: noop$1,
-  polygonEnd: noop$1,
+  lineStart: noop$2,
+  lineEnd: noop$2,
+  polygonStart: noop$2,
+  polygonEnd: noop$2,
   result: function() {
     var bounds = [[x0$2, y0$2], [x1, y1]];
     x1 = y1 = -(y0$2 = x0$2 = Infinity);
@@ -8652,19 +9192,19 @@ function boundsPoint$1(x, y) {
 
 // TODO Enforce positive area for exterior, negative area for interior?
 
-var X0$1 = 0;
-var Y0$1 = 0;
-var Z0$1 = 0;
-var X1$1 = 0;
-var Y1$1 = 0;
-var Z1$1 = 0;
-var X2$1 = 0;
-var Y2$1 = 0;
-var Z2$1 = 0;
-var x00$1;
-var y00$1;
-var x0$3;
-var y0$3;
+var X0$1 = 0,
+    Y0$1 = 0,
+    Z0$1 = 0,
+    X1$1 = 0,
+    Y1$1 = 0,
+    Z1$1 = 0,
+    X2$1 = 0,
+    Y2$1 = 0,
+    Z2$1 = 0,
+    x00$1,
+    y00$1,
+    x0$3,
+    y0$3;
 
 var centroidStream$1 = {
   point: centroidPoint$1,
@@ -8787,24 +9327,24 @@ PathContext.prototype = {
       }
     }
   },
-  result: noop$1
+  result: noop$2
 };
 
-var lengthSum$1 = adder();
-var lengthRing;
-var x00$2;
-var y00$2;
-var x0$4;
-var y0$4;
+var lengthSum$1 = adder(),
+    lengthRing,
+    x00$2,
+    y00$2,
+    x0$4,
+    y0$4;
 
 var lengthStream$1 = {
-  point: noop$1,
+  point: noop$2,
   lineStart: function() {
     lengthStream$1.point = lengthPointFirst$1;
   },
   lineEnd: function() {
     if (lengthRing) lengthPoint$1(x00$2, y00$2);
-    lengthStream$1.point = noop$1;
+    lengthStream$1.point = noop$2;
   },
   polygonStart: function() {
     lengthRing = true;
@@ -8890,7 +9430,7 @@ function circle$1(radius) {
       + "z";
 }
 
-var index$1 = function(projection, context) {
+function index$1(projection, context) {
   var pointRadius = 4.5,
       projectionStream,
       contextStream;
@@ -8941,13 +9481,13 @@ var index$1 = function(projection, context) {
   };
 
   return path.projection(projection).context(context);
-};
+}
 
-var transform = function(methods) {
+function transform(methods) {
   return {
     stream: transformer(methods)
   };
-};
+}
 
 function transformer(methods) {
   return function(stream) {
@@ -9015,12 +9555,12 @@ function fitHeight(projection, height, object) {
   }, object);
 }
 
-var maxDepth = 16;
-var cosMinDistance = cos$1(30 * radians); // cos(minimum angular distance)
+var maxDepth = 16, // maximum depth of subdivision
+    cosMinDistance = cos$1(30 * radians); // cos(minimum angular distance)
 
-var resample = function(project, delta2) {
+function resample(project, delta2) {
   return +delta2 ? resample$1(project, delta2) : resampleNone(project);
-};
+}
 
 function resampleNone(project) {
   return transformer({
@@ -9129,6 +9669,34 @@ function transformRotate(rotate) {
   });
 }
 
+function scaleTranslate(k, dx, dy) {
+  function transform$$1(x, y) {
+    return [dx + k * x, dy - k * y];
+  }
+  transform$$1.invert = function(x, y) {
+    return [(x - dx) / k, (dy - y) / k];
+  };
+  return transform$$1;
+}
+
+function scaleTranslateRotate(k, dx, dy, alpha) {
+  var cosAlpha = cos$1(alpha),
+      sinAlpha = sin$1(alpha),
+      a = cosAlpha * k,
+      b = sinAlpha * k,
+      ai = cosAlpha / k,
+      bi = sinAlpha / k,
+      ci = (sinAlpha * dy - cosAlpha * dx) / k,
+      fi = (sinAlpha * dx + cosAlpha * dy) / k;
+  function transform$$1(x, y) {
+    return [a * x - b * y + dx, dy - b * x - a * y];
+  }
+  transform$$1.invert = function(x, y) {
+    return [ai * x - bi * y + ci, fi - bi * x - ai * y];
+  };
+  return transform$$1;
+}
+
 function projection(project) {
   return projectionMutator(function() { return project; })();
 }
@@ -9137,28 +9705,27 @@ function projectionMutator(projectAt) {
   var project,
       k = 150, // scale
       x = 480, y = 250, // translate
-      dx, dy, lambda = 0, phi = 0, // center
-      deltaLambda = 0, deltaPhi = 0, deltaGamma = 0, rotate, projectRotate, // rotate
-      theta = null, preclip = clipAntimeridian, // clip angle
-      x0 = null, y0, x1, y1, postclip = identity$4, // clip extent
-      delta2 = 0.5, projectResample = resample(projectTransform, delta2), // precision
+      lambda = 0, phi = 0, // center
+      deltaLambda = 0, deltaPhi = 0, deltaGamma = 0, rotate, // pre-rotate
+      alpha = 0, // post-rotate
+      theta = null, preclip = clipAntimeridian, // pre-clip angle
+      x0 = null, y0, x1, y1, postclip = identity$4, // post-clip extent
+      delta2 = 0.5, // precision
+      projectResample,
+      projectTransform,
+      projectRotateTransform,
       cache,
       cacheStream;
 
   function projection(point) {
-    point = projectRotate(point[0] * radians, point[1] * radians);
-    return [point[0] * k + dx, dy - point[1] * k];
+    return projectRotateTransform(point[0] * radians, point[1] * radians);
   }
 
   function invert(point) {
-    point = projectRotate.invert((point[0] - dx) / k, (dy - point[1]) / k);
+    point = projectRotateTransform.invert(point[0], point[1]);
     return point && [point[0] * degrees$1, point[1] * degrees$1];
   }
 
-  function projectTransform(x, y) {
-    return x = project(x, y), [x[0] * k + dx, dy - x[1] * k];
-  }
-
   projection.stream = function(stream) {
     return cache && cacheStream === stream ? cache : cache = transformRadians(transformRotate(rotate)(preclip(projectResample(postclip(cacheStream = stream)))));
   };
@@ -9195,6 +9762,10 @@ function projectionMutator(projectAt) {
     return arguments.length ? (deltaLambda = _[0] % 360 * radians, deltaPhi = _[1] % 360 * radians, deltaGamma = _.length > 2 ? _[2] % 360 * radians : 0, recenter()) : [deltaLambda * degrees$1, deltaPhi * degrees$1, deltaGamma * degrees$1];
   };
 
+  projection.angle = function(_) {
+    return arguments.length ? (alpha = _ % 360 * radians, recenter()) : alpha * degrees$1;
+  };
+
   projection.precision = function(_) {
     return arguments.length ? (projectResample = resample(projectTransform, delta2 = _ * _), reset()) : sqrt(delta2);
   };
@@ -9216,10 +9787,12 @@ function projectionMutator(projectAt) {
   };
 
   function recenter() {
-    projectRotate = compose(rotate = rotateRadians(deltaLambda, deltaPhi, deltaGamma), project);
-    var center = project(lambda, phi);
-    dx = x - center[0] * k;
-    dy = y + center[1] * k;
+    var center = scaleTranslateRotate(k, 0, 0, alpha).apply(null, project(lambda, phi)),
+        transform$$1 = (alpha ? scaleTranslateRotate : scaleTranslate)(k, x - center[0], y - center[1], alpha);
+    rotate = rotateRadians(deltaLambda, deltaPhi, deltaGamma);
+    projectTransform = compose(project, transform$$1);
+    projectRotateTransform = compose(rotate, projectTransform);
+    projectResample = resample(projectTransform, delta2);
     return reset();
   }
 
@@ -9283,20 +9856,20 @@ function conicEqualAreaRaw(y0, y1) {
   return project;
 }
 
-var conicEqualArea = function() {
+function conicEqualArea() {
   return conicProjection(conicEqualAreaRaw)
       .scale(155.424)
       .center([0, 33.6442]);
-};
+}
 
-var albers = function() {
+function albers() {
   return conicEqualArea()
       .parallels([29.5, 45.5])
       .scale(1070)
       .translate([480, 250])
       .rotate([96, 0])
       .center([-0.6, 38.7]);
-};
+}
 
 // The projections must have mutually exclusive clip regions on the sphere,
 // as this will avoid emitting interleaving lines and polygons.
@@ -9317,7 +9890,7 @@ function multiplex(streams) {
 // scale to 1285 and adjust the translate accordingly. The set of standard
 // parallels for each region comes from USGS, which is published here:
 // http://egsc.usgs.gov/isb/pubs/MapProjections/projections.html#albers
-var albersUsa = function() {
+function albersUsa() {
   var cache,
       cacheStream,
       lower48 = albers(), lower48Point,
@@ -9327,7 +9900,8 @@ var albersUsa = function() {
 
   function albersUsa(coordinates) {
     var x = coordinates[0], y = coordinates[1];
-    return point = null, (lower48Point.point(x, y), point)
+    return point = null,
+        (lower48Point.point(x, y), point)
         || (alaskaPoint.point(x, y), point)
         || (hawaiiPoint.point(x, y), point);
   }
@@ -9402,7 +9976,7 @@ var albersUsa = function() {
   }
 
   return albersUsa.scale(1070);
-};
+}
 
 function azimuthalRaw(scale) {
   return function(x, y) {
@@ -9437,11 +10011,11 @@ azimuthalEqualAreaRaw.invert = azimuthalInvert(function(z) {
   return 2 * asin(z / 2);
 });
 
-var azimuthalEqualArea = function() {
+function azimuthalEqualArea() {
   return projection(azimuthalEqualAreaRaw)
       .scale(124.75)
       .clipAngle(180 - 1e-3);
-};
+}
 
 var azimuthalEquidistantRaw = azimuthalRaw(function(c) {
   return (c = acos(c)) && c / sin$1(c);
@@ -9451,11 +10025,11 @@ azimuthalEquidistantRaw.invert = azimuthalInvert(function(z) {
   return z;
 });
 
-var azimuthalEquidistant = function() {
+function azimuthalEquidistant() {
   return projection(azimuthalEquidistantRaw)
       .scale(79.4188)
       .clipAngle(180 - 1e-3);
-};
+}
 
 function mercatorRaw(lambda, phi) {
   return [lambda, log(tan((halfPi$2 + phi) / 2))];
@@ -9465,10 +10039,10 @@ mercatorRaw.invert = function(x, y) {
   return [x, 2 * atan(exp(y)) - halfPi$2];
 };
 
-var mercator = function() {
+function mercator() {
   return mercatorProjection(mercatorRaw)
       .scale(961 / tau$3);
-};
+}
 
 function mercatorProjection(project) {
   var m = projection(project),
@@ -9491,7 +10065,7 @@ function mercatorProjection(project) {
   };
 
   m.clipExtent = function(_) {
-    return arguments.length ? (_ == null ? x0 = y0 = x1 = y1 = null : (x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reclip()) : x0 == null ? null : [[x0, y0], [x1, y1]];
+    return arguments.length ? ((_ == null ? x0 = y0 = x1 = y1 = null : (x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1])), reclip()) : x0 == null ? null : [[x0, y0], [x1, y1]];
   };
 
   function reclip() {
@@ -9532,11 +10106,11 @@ function conicConformalRaw(y0, y1) {
   return project;
 }
 
-var conicConformal = function() {
+function conicConformal() {
   return conicProjection(conicConformalRaw)
       .scale(109.5)
       .parallels([30, 30]);
-};
+}
 
 function equirectangularRaw(lambda, phi) {
   return [lambda, phi];
@@ -9544,10 +10118,10 @@ function equirectangularRaw(lambda, phi) {
 
 equirectangularRaw.invert = equirectangularRaw;
 
-var equirectangular = function() {
+function equirectangular() {
   return projection(equirectangularRaw)
       .scale(152.63);
-};
+}
 
 function conicEquidistantRaw(y0, y1) {
   var cy0 = cos$1(y0),
@@ -9569,12 +10143,46 @@ function conicEquidistantRaw(y0, y1) {
   return project;
 }
 
-var conicEquidistant = function() {
+function conicEquidistant() {
   return conicProjection(conicEquidistantRaw)
       .scale(131.154)
       .center([0, 13.9389]);
+}
+
+var A1 = 1.340264,
+    A2 = -0.081106,
+    A3 = 0.000893,
+    A4 = 0.003796,
+    M = sqrt(3) / 2,
+    iterations = 12;
+
+function equalEarthRaw(lambda, phi) {
+  var l = asin(M * sin$1(phi)), l2 = l * l, l6 = l2 * l2 * l2;
+  return [
+    lambda * cos$1(l) / (M * (A1 + 3 * A2 * l2 + l6 * (7 * A3 + 9 * A4 * l2))),
+    l * (A1 + A2 * l2 + l6 * (A3 + A4 * l2))
+  ];
+}
+
+equalEarthRaw.invert = function(x, y) {
+  var l = y, l2 = l * l, l6 = l2 * l2 * l2;
+  for (var i = 0, delta, fy, fpy; i < iterations; ++i) {
+    fy = l * (A1 + A2 * l2 + l6 * (A3 + A4 * l2)) - y;
+    fpy = A1 + 3 * A2 * l2 + l6 * (7 * A3 + 9 * A4 * l2);
+    l -= delta = fy / fpy, l2 = l * l, l6 = l2 * l2 * l2;
+    if (abs(delta) < epsilon2$1) break;
+  }
+  return [
+    M * x * (A1 + 3 * A2 * l2 + l6 * (7 * A3 + 9 * A4 * l2)) / cos$1(l),
+    asin(sin$1(l) / M)
+  ];
 };
 
+function equalEarth() {
+  return projection(equalEarthRaw)
+      .scale(177.158);
+}
+
 function gnomonicRaw(x, y) {
   var cy = cos$1(y), k = cos$1(x) * cy;
   return [cy * sin$1(x) / k, sin$1(y) / k];
@@ -9582,13 +10190,13 @@ function gnomonicRaw(x, y) {
 
 gnomonicRaw.invert = azimuthalInvert(atan);
 
-var gnomonic = function() {
+function gnomonic() {
   return projection(gnomonicRaw)
       .scale(144.049)
       .clipAngle(60);
-};
+}
 
-function scaleTranslate(kx, ky, tx, ty) {
+function scaleTranslate$1(kx, ky, tx, ty) {
   return kx === 1 && ky === 1 && tx === 0 && ty === 0 ? identity$4 : transformer({
     point: function(x, y) {
       this.stream.point(x * kx + tx, y * ky + ty);
@@ -9596,7 +10204,7 @@ function scaleTranslate(kx, ky, tx, ty) {
   });
 }
 
-var identity$5 = function() {
+function identity$5() {
   var k = 1, tx = 0, ty = 0, sx = 1, sy = 1, transform$$1 = identity$4, // scale, translate and reflect
       x0 = null, y0, x1, y1, // clip extent
       postclip = identity$4,
@@ -9620,16 +10228,16 @@ var identity$5 = function() {
       return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity$4) : clipRectangle(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];
     },
     scale: function(_) {
-      return arguments.length ? (transform$$1 = scaleTranslate((k = +_) * sx, k * sy, tx, ty), reset()) : k;
+      return arguments.length ? (transform$$1 = scaleTranslate$1((k = +_) * sx, k * sy, tx, ty), reset()) : k;
     },
     translate: function(_) {
-      return arguments.length ? (transform$$1 = scaleTranslate(k * sx, k * sy, tx = +_[0], ty = +_[1]), reset()) : [tx, ty];
+      return arguments.length ? (transform$$1 = scaleTranslate$1(k * sx, k * sy, tx = +_[0], ty = +_[1]), reset()) : [tx, ty];
     },
     reflectX: function(_) {
-      return arguments.length ? (transform$$1 = scaleTranslate(k * (sx = _ ? -1 : 1), k * sy, tx, ty), reset()) : sx < 0;
+      return arguments.length ? (transform$$1 = scaleTranslate$1(k * (sx = _ ? -1 : 1), k * sy, tx, ty), reset()) : sx < 0;
     },
     reflectY: function(_) {
-      return arguments.length ? (transform$$1 = scaleTranslate(k * sx, k * (sy = _ ? -1 : 1), tx, ty), reset()) : sy < 0;
+      return arguments.length ? (transform$$1 = scaleTranslate$1(k * sx, k * (sy = _ ? -1 : 1), tx, ty), reset()) : sy < 0;
     },
     fitExtent: function(extent, object) {
       return fitExtent(projection, extent, object);
@@ -9644,7 +10252,7 @@ var identity$5 = function() {
       return fitHeight(projection, height, object);
     }
   };
-};
+}
 
 function naturalEarth1Raw(lambda, phi) {
   var phi2 = phi * phi, phi4 = phi2 * phi2;
@@ -9667,10 +10275,10 @@ naturalEarth1Raw.invert = function(x, y) {
   ];
 };
 
-var naturalEarth1 = function() {
+function naturalEarth1() {
   return projection(naturalEarth1Raw)
       .scale(175.295);
-};
+}
 
 function orthographicRaw(x, y) {
   return [cos$1(y) * sin$1(x), sin$1(y)];
@@ -9678,11 +10286,11 @@ function orthographicRaw(x, y) {
 
 orthographicRaw.invert = azimuthalInvert(asin);
 
-var orthographic = function() {
+function orthographic() {
   return projection(orthographicRaw)
       .scale(249.5)
       .clipAngle(90 + epsilon$2);
-};
+}
 
 function stereographicRaw(x, y) {
   var cy = cos$1(y), k = 1 + cos$1(x) * cy;
@@ -9693,11 +10301,11 @@ stereographicRaw.invert = azimuthalInvert(function(z) {
   return 2 * atan(z);
 });
 
-var stereographic = function() {
+function stereographic() {
   return projection(stereographicRaw)
       .scale(250)
       .clipAngle(142);
-};
+}
 
 function transverseMercatorRaw(lambda, phi) {
   return [log(tan((halfPi$2 + phi) / 2)), -lambda];
@@ -9707,7 +10315,7 @@ transverseMercatorRaw.invert = function(x, y) {
   return [-y, 2 * atan(exp(x)) - halfPi$2];
 };
 
-var transverseMercator = function() {
+function transverseMercator() {
   var m = mercatorProjection(transverseMercatorRaw),
       center = m.center,
       rotate = m.rotate;
@@ -9722,7 +10330,7 @@ var transverseMercator = function() {
 
   return rotate([0, 0, 90])
       .scale(159.155);
-};
+}
 
 function defaultSeparation(a, b) {
   return a.parent === b.parent ? 1 : 2;
@@ -9756,7 +10364,7 @@ function leafRight(node) {
   return node;
 }
 
-var cluster = function() {
+function cluster() {
   var separation = defaultSeparation,
       dx = 1,
       dy = 1,
@@ -9807,7 +10415,7 @@ var cluster = function() {
   };
 
   return cluster;
-};
+}
 
 function count(node) {
   var sum = 0,
@@ -9818,11 +10426,11 @@ function count(node) {
   node.value = sum;
 }
 
-var node_count = function() {
+function node_count() {
   return this.eachAfter(count);
-};
+}
 
-var node_each = function(callback) {
+function node_each(callback) {
   var node = this, current, next = [node], children, i, n;
   do {
     current = next.reverse(), next = [];
@@ -9834,9 +10442,9 @@ var node_each = function(callback) {
     }
   } while (next.length);
   return this;
-};
+}
 
-var node_eachBefore = function(callback) {
+function node_eachBefore(callback) {
   var node = this, nodes = [node], children, i;
   while (node = nodes.pop()) {
     callback(node), children = node.children;
@@ -9845,9 +10453,9 @@ var node_eachBefore = function(callback) {
     }
   }
   return this;
-};
+}
 
-var node_eachAfter = function(callback) {
+function node_eachAfter(callback) {
   var node = this, nodes = [node], next = [], children, i, n;
   while (node = nodes.pop()) {
     next.push(node), children = node.children;
@@ -9859,9 +10467,9 @@ var node_eachAfter = function(callback) {
     callback(node);
   }
   return this;
-};
+}
 
-var node_sum = function(value) {
+function node_sum(value) {
   return this.eachAfter(function(node) {
     var sum = +value(node.data) || 0,
         children = node.children,
@@ -9869,17 +10477,17 @@ var node_sum = function(value) {
     while (--i >= 0) sum += children[i].value;
     node.value = sum;
   });
-};
+}
 
-var node_sort = function(compare) {
+function node_sort(compare) {
   return this.eachBefore(function(node) {
     if (node.children) {
       node.children.sort(compare);
     }
   });
-};
+}
 
-var node_path = function(end) {
+function node_path(end) {
   var start = this,
       ancestor = leastCommonAncestor(start, end),
       nodes = [start];
@@ -9893,7 +10501,7 @@ var node_path = function(end) {
     end = end.parent;
   }
   return nodes;
-};
+}
 
 function leastCommonAncestor(a, b) {
   if (a === b) return a;
@@ -9910,23 +10518,23 @@ function leastCommonAncestor(a, b) {
   return c;
 }
 
-var node_ancestors = function() {
+function node_ancestors() {
   var node = this, nodes = [node];
   while (node = node.parent) {
     nodes.push(node);
   }
   return nodes;
-};
+}
 
-var node_descendants = function() {
+function node_descendants() {
   var nodes = [];
   this.each(function(node) {
     nodes.push(node);
   });
   return nodes;
-};
+}
 
-var node_leaves = function() {
+function node_leaves() {
   var leaves = [];
   this.eachBefore(function(node) {
     if (!node.children) {
@@ -9934,9 +10542,9 @@ var node_leaves = function() {
     }
   });
   return leaves;
-};
+}
 
-var node_links = function() {
+function node_links() {
   var root = this, links = [];
   root.each(function(node) {
     if (node !== root) { // Don’t include the root’s parent, if any.
@@ -9944,7 +10552,7 @@ var node_links = function() {
     }
   });
   return links;
-};
+}
 
 function hierarchy(data, children) {
   var root = new Node(data),
@@ -10014,7 +10622,7 @@ Node.prototype = hierarchy.prototype = {
   copy: node_copy
 };
 
-var slice$3 = Array.prototype.slice;
+var slice$4 = Array.prototype.slice;
 
 function shuffle$1(array) {
   var m = array.length,
@@ -10031,8 +10639,8 @@ function shuffle$1(array) {
   return array;
 }
 
-var enclose = function(circles) {
-  var i = 0, n = (circles = shuffle$1(slice$3.call(circles))).length, B = [], p, e;
+function enclose(circles) {
+  var i = 0, n = (circles = shuffle$1(slice$4.call(circles))).length, B = [], p, e;
 
   while (i < n) {
     p = circles[i];
@@ -10041,7 +10649,7 @@ var enclose = function(circles) {
   }
 
   return e;
-};
+}
 
 function extendBasis(B, p) {
   var i, j;
@@ -10148,30 +10756,33 @@ function encloseBasis3(a, b, c) {
   };
 }
 
-function place(a, b, c) {
-  var ax = a.x,
-      ay = a.y,
-      da = b.r + c.r,
-      db = a.r + c.r,
-      dx = b.x - ax,
-      dy = b.y - ay,
-      dc = dx * dx + dy * dy;
-  if (dc) {
-    var x = 0.5 + ((db *= db) - (da *= da)) / (2 * dc),
-        y = Math.sqrt(Math.max(0, 2 * da * (db + dc) - (db -= dc) * db - da * da)) / (2 * dc);
-    c.x = ax + x * dx + y * dy;
-    c.y = ay + x * dy - y * dx;
+function place(b, a, c) {
+  var dx = b.x - a.x, x, a2,
+      dy = b.y - a.y, y, b2,
+      d2 = dx * dx + dy * dy;
+  if (d2) {
+    a2 = a.r + c.r, a2 *= a2;
+    b2 = b.r + c.r, b2 *= b2;
+    if (a2 > b2) {
+      x = (d2 + b2 - a2) / (2 * d2);
+      y = Math.sqrt(Math.max(0, b2 / d2 - x * x));
+      c.x = b.x - x * dx - y * dy;
+      c.y = b.y - x * dy + y * dx;
+    } else {
+      x = (d2 + a2 - b2) / (2 * d2);
+      y = Math.sqrt(Math.max(0, a2 / d2 - x * x));
+      c.x = a.x + x * dx - y * dy;
+      c.y = a.y + x * dy + y * dx;
+    }
   } else {
-    c.x = ax + db;
-    c.y = ay;
+    c.x = a.x + c.r;
+    c.y = a.y;
   }
 }
 
 function intersects(a, b) {
-  var dx = b.x - a.x,
-      dy = b.y - a.y,
-      dr = a.r + b.r;
-  return dr * dr - 1e-6 > dx * dx + dy * dy;
+  var dr = a.r + b.r - 1e-6, dx = b.x - a.x, dy = b.y - a.y;
+  return dr > 0 && dr * dr > dx * dx + dy * dy;
 }
 
 function score(node) {
@@ -10257,10 +10868,10 @@ function packEnclose(circles) {
   return c.r;
 }
 
-var siblings = function(circles) {
+function siblings(circles) {
   packEnclose(circles);
   return circles;
-};
+}
 
 function optional(f) {
   return f == null ? null : required(f);
@@ -10275,17 +10886,17 @@ function constantZero() {
   return 0;
 }
 
-var constant$8 = function(x) {
+function constant$9(x) {
   return function() {
     return x;
   };
-};
+}
 
 function defaultRadius$1(d) {
   return Math.sqrt(d.value);
 }
 
-var index$2 = function() {
+function index$2() {
   var radius = null,
       dx = 1,
       dy = 1,
@@ -10315,11 +10926,11 @@ var index$2 = function() {
   };
 
   pack.padding = function(x) {
-    return arguments.length ? (padding = typeof x === "function" ? x : constant$8(+x), pack) : padding;
+    return arguments.length ? (padding = typeof x === "function" ? x : constant$9(+x), pack) : padding;
   };
 
   return pack;
-};
+}
 
 function radiusLeaf(radius) {
   return function(node) {
@@ -10357,14 +10968,14 @@ function translateChild(k) {
   };
 }
 
-var roundNode = function(node) {
+function roundNode(node) {
   node.x0 = Math.round(node.x0);
   node.y0 = Math.round(node.y0);
   node.x1 = Math.round(node.x1);
   node.y1 = Math.round(node.y1);
-};
+}
 
-var treemapDice = function(parent, x0, y0, x1, y1) {
+function treemapDice(parent, x0, y0, x1, y1) {
   var nodes = parent.children,
       node,
       i = -1,
@@ -10375,9 +10986,9 @@ var treemapDice = function(parent, x0, y0, x1, y1) {
     node = nodes[i], node.y0 = y0, node.y1 = y1;
     node.x0 = x0, node.x1 = x0 += node.value * k;
   }
-};
+}
 
-var partition = function() {
+function partition() {
   var dx = 1,
       dy = 1,
       padding = 0,
@@ -10425,11 +11036,11 @@ var partition = function() {
   };
 
   return partition;
-};
+}
 
-var keyPrefix$1 = "$";
-var preroot = {depth: -1};
-var ambiguous = {};
+var keyPrefix$1 = "$", // Protect against keys like “__proto__”.
+    preroot = {depth: -1},
+    ambiguous = {};
 
 function defaultId(d) {
   return d.id;
@@ -10439,7 +11050,7 @@ function defaultParentId(d) {
   return d.parentId;
 }
 
-var stratify = function() {
+function stratify() {
   var id = defaultId,
       parentId = defaultParentId;
 
@@ -10496,7 +11107,7 @@ var stratify = function() {
   };
 
   return stratify;
-};
+}
 
 function defaultSeparation$1(a, b) {
   return a.parent === b.parent ? 1 : 2;
@@ -10595,7 +11206,7 @@ function treeRoot(root) {
 }
 
 // Node-link tree diagram using the Reingold-Tilford "tidy" algorithm
-var tree = function() {
+function tree() {
   var separation = defaultSeparation$1,
       dx = 1,
       dy = 1,
@@ -10732,9 +11343,9 @@ var tree = function() {
   };
 
   return tree;
-};
+}
 
-var treemapSlice = function(parent, x0, y0, x1, y1) {
+function treemapSlice(parent, x0, y0, x1, y1) {
   var nodes = parent.children,
       node,
       i = -1,
@@ -10745,7 +11356,7 @@ var treemapSlice = function(parent, x0, y0, x1, y1) {
     node = nodes[i], node.x0 = x0, node.x1 = x1;
     node.y0 = y0, node.y1 = y0 += node.value * k;
   }
-};
+}
 
 var phi = (1 + Math.sqrt(5)) / 2;
 
@@ -10811,7 +11422,7 @@ var squarify = (function custom(ratio) {
   return squarify;
 })(phi);
 
-var index$3 = function() {
+function index$3() {
   var tile = squarify,
       round = false,
       dx = 1,
@@ -10875,7 +11486,7 @@ var index$3 = function() {
   };
 
   treemap.paddingInner = function(x) {
-    return arguments.length ? (paddingInner = typeof x === "function" ? x : constant$8(+x), treemap) : paddingInner;
+    return arguments.length ? (paddingInner = typeof x === "function" ? x : constant$9(+x), treemap) : paddingInner;
   };
 
   treemap.paddingOuter = function(x) {
@@ -10883,25 +11494,25 @@ var index$3 = function() {
   };
 
   treemap.paddingTop = function(x) {
-    return arguments.length ? (paddingTop = typeof x === "function" ? x : constant$8(+x), treemap) : paddingTop;
+    return arguments.length ? (paddingTop = typeof x === "function" ? x : constant$9(+x), treemap) : paddingTop;
   };
 
   treemap.paddingRight = function(x) {
-    return arguments.length ? (paddingRight = typeof x === "function" ? x : constant$8(+x), treemap) : paddingRight;
+    return arguments.length ? (paddingRight = typeof x === "function" ? x : constant$9(+x), treemap) : paddingRight;
   };
 
   treemap.paddingBottom = function(x) {
-    return arguments.length ? (paddingBottom = typeof x === "function" ? x : constant$8(+x), treemap) : paddingBottom;
+    return arguments.length ? (paddingBottom = typeof x === "function" ? x : constant$9(+x), treemap) : paddingBottom;
   };
 
   treemap.paddingLeft = function(x) {
-    return arguments.length ? (paddingLeft = typeof x === "function" ? x : constant$8(+x), treemap) : paddingLeft;
+    return arguments.length ? (paddingLeft = typeof x === "function" ? x : constant$9(+x), treemap) : paddingLeft;
   };
 
   return treemap;
-};
+}
 
-var binary = function(parent, x0, y0, x1, y1) {
+function binary(parent, x0, y0, x1, y1) {
   var nodes = parent.children,
       i, n = nodes.length,
       sum, sums = new Array(n + 1);
@@ -10946,11 +11557,11 @@ var binary = function(parent, x0, y0, x1, y1) {
       partition(k, j, valueRight, x0, yk, x1, y1);
     }
   }
-};
+}
 
-var sliceDice = function(parent, x0, y0, x1, y1) {
+function sliceDice(parent, x0, y0, x1, y1) {
   (parent.depth & 1 ? treemapSlice : treemapDice)(parent, x0, y0, x1, y1);
-};
+}
 
 var resquarify = (function custom(ratio) {
 
@@ -10985,7 +11596,7 @@ var resquarify = (function custom(ratio) {
   return resquarify;
 })(phi);
 
-var area$1 = function(polygon) {
+function area$2(polygon) {
   var i = -1,
       n = polygon.length,
       a,
@@ -10999,9 +11610,9 @@ var area$1 = function(polygon) {
   }
 
   return area / 2;
-};
+}
 
-var centroid$1 = function(polygon) {
+function centroid$1(polygon) {
   var i = -1,
       n = polygon.length,
       x = 0,
@@ -11020,15 +11631,15 @@ var centroid$1 = function(polygon) {
   }
 
   return k *= 3, [x / k, y / k];
-};
+}
 
 // Returns the 2D cross product of AB and AC vectors, i.e., the z-component of
 // the 3D cross product in a quadrant I Cartesian coordinate system (+x is
 // right, +y is up). Returns a positive value if ABC is counter-clockwise,
 // negative if clockwise, and zero if the points are collinear.
-var cross$1 = function(a, b, c) {
+function cross$1(a, b, c) {
   return (b[0] - a[0]) * (c[1] - a[1]) - (b[1] - a[1]) * (c[0] - a[0]);
-};
+}
 
 function lexicographicOrder(a, b) {
   return a[0] - b[0] || a[1] - b[1];
@@ -11050,7 +11661,7 @@ function computeUpperHullIndexes(points) {
   return indexes.slice(0, size); // remove popped points
 }
 
-var hull = function(points) {
+function hull(points) {
   if ((n = points.length) < 3) return null;
 
   var i,
@@ -11076,9 +11687,9 @@ var hull = function(points) {
   for (i = +skipLeft; i < lowerIndexes.length - skipRight; ++i) hull.push(points[sortedPoints[lowerIndexes[i]][2]]);
 
   return hull;
-};
+}
 
-var contains$1 = function(polygon, point) {
+function contains$2(polygon, point) {
   var n = polygon.length,
       p = polygon[n - 1],
       x = point[0], y = point[1],
@@ -11093,9 +11704,9 @@ var contains$1 = function(polygon, point) {
   }
 
   return inside;
-};
+}
 
-var length$2 = function(polygon) {
+function length$2(polygon) {
   var i = -1,
       n = polygon.length,
       b = polygon[n - 1],
@@ -11110,140 +11721,18 @@ var length$2 = function(polygon) {
     ya = yb;
     b = polygon[i];
     xb = b[0];
-    yb = b[1];
-    xa -= xb;
-    ya -= yb;
-    perimeter += Math.sqrt(xa * xa + ya * ya);
-  }
-
-  return perimeter;
-};
-
-var slice$4 = [].slice;
-
-var noabort = {};
-
-function Queue(size) {
-  this._size = size;
-  this._call =
-  this._error = null;
-  this._tasks = [];
-  this._data = [];
-  this._waiting =
-  this._active =
-  this._ended =
-  this._start = 0; // inside a synchronous task callback?
-}
-
-Queue.prototype = queue.prototype = {
-  constructor: Queue,
-  defer: function(callback) {
-    if (typeof callback !== "function") throw new Error("invalid callback");
-    if (this._call) throw new Error("defer after await");
-    if (this._error != null) return this;
-    var t = slice$4.call(arguments, 1);
-    t.push(callback);
-    ++this._waiting, this._tasks.push(t);
-    poke$1(this);
-    return this;
-  },
-  abort: function() {
-    if (this._error == null) abort(this, new Error("abort"));
-    return this;
-  },
-  await: function(callback) {
-    if (typeof callback !== "function") throw new Error("invalid callback");
-    if (this._call) throw new Error("multiple await");
-    this._call = function(error, results) { callback.apply(null, [error].concat(results)); };
-    maybeNotify(this);
-    return this;
-  },
-  awaitAll: function(callback) {
-    if (typeof callback !== "function") throw new Error("invalid callback");
-    if (this._call) throw new Error("multiple await");
-    this._call = callback;
-    maybeNotify(this);
-    return this;
-  }
-};
-
-function poke$1(q) {
-  if (!q._start) {
-    try { start$1(q); } // let the current task complete
-    catch (e) {
-      if (q._tasks[q._ended + q._active - 1]) abort(q, e); // task errored synchronously
-      else if (!q._data) throw e; // await callback errored synchronously
-    }
-  }
-}
-
-function start$1(q) {
-  while (q._start = q._waiting && q._active < q._size) {
-    var i = q._ended + q._active,
-        t = q._tasks[i],
-        j = t.length - 1,
-        c = t[j];
-    t[j] = end(q, i);
-    --q._waiting, ++q._active;
-    t = c.apply(null, t);
-    if (!q._tasks[i]) continue; // task finished synchronously
-    q._tasks[i] = t || noabort;
-  }
-}
-
-function end(q, i) {
-  return function(e, r) {
-    if (!q._tasks[i]) return; // ignore multiple callbacks
-    --q._active, ++q._ended;
-    q._tasks[i] = null;
-    if (q._error != null) return; // ignore secondary errors
-    if (e != null) {
-      abort(q, e);
-    } else {
-      q._data[i] = r;
-      if (q._waiting) poke$1(q);
-      else maybeNotify(q);
-    }
-  };
-}
-
-function abort(q, e) {
-  var i = q._tasks.length, t;
-  q._error = e; // ignore active callbacks
-  q._data = undefined; // allow gc
-  q._waiting = NaN; // prevent starting
-
-  while (--i >= 0) {
-    if (t = q._tasks[i]) {
-      q._tasks[i] = null;
-      if (t.abort) {
-        try { t.abort(); }
-        catch (e) { /* ignore */ }
-      }
-    }
-  }
-
-  q._active = NaN; // allow notification
-  maybeNotify(q);
-}
-
-function maybeNotify(q) {
-  if (!q._active && q._call) {
-    var d = q._data;
-    q._data = undefined; // allow gc
-    q._call(q._error, d);
+    yb = b[1];
+    xa -= xb;
+    ya -= yb;
+    perimeter += Math.sqrt(xa * xa + ya * ya);
   }
-}
 
-function queue(concurrency) {
-  if (concurrency == null) concurrency = Infinity;
-  else if (!((concurrency = +concurrency) >= 1)) throw new Error("invalid concurrency");
-  return new Queue(concurrency);
+  return perimeter;
 }
 
-var defaultSource$1 = function() {
+function defaultSource$1() {
   return Math.random();
-};
+}
 
 var uniform = (function sourceRandomUniform(source) {
   function randomUniform(min, max) {
@@ -11339,208 +11828,10 @@ var exponential$1 = (function sourceRandomExponential(source) {
   return randomExponential;
 })(defaultSource$1);
 
-var request = function(url, callback) {
-  var request,
-      event = dispatch("beforesend", "progress", "load", "error"),
-      mimeType,
-      headers = map$1(),
-      xhr = new XMLHttpRequest,
-      user = null,
-      password = null,
-      response,
-      responseType,
-      timeout = 0;
-
-  // If IE does not support CORS, use XDomainRequest.
-  if (typeof XDomainRequest !== "undefined"
-      && !("withCredentials" in xhr)
-      && /^(http(s)?:)?\/\//.test(url)) xhr = new XDomainRequest;
-
-  "onload" in xhr
-      ? xhr.onload = xhr.onerror = xhr.ontimeout = respond
-      : xhr.onreadystatechange = function(o) { xhr.readyState > 3 && respond(o); };
-
-  function respond(o) {
-    var status = xhr.status, result;
-    if (!status && hasResponse(xhr)
-        || status >= 200 && status < 300
-        || status === 304) {
-      if (response) {
-        try {
-          result = response.call(request, xhr);
-        } catch (e) {
-          event.call("error", request, e);
-          return;
-        }
-      } else {
-        result = xhr;
-      }
-      event.call("load", request, result);
-    } else {
-      event.call("error", request, o);
-    }
-  }
-
-  xhr.onprogress = function(e) {
-    event.call("progress", request, e);
-  };
-
-  request = {
-    header: function(name, value) {
-      name = (name + "").toLowerCase();
-      if (arguments.length < 2) return headers.get(name);
-      if (value == null) headers.remove(name);
-      else headers.set(name, value + "");
-      return request;
-    },
-
-    // If mimeType is non-null and no Accept header is set, a default is used.
-    mimeType: function(value) {
-      if (!arguments.length) return mimeType;
-      mimeType = value == null ? null : value + "";
-      return request;
-    },
-
-    // Specifies what type the response value should take;
-    // for instance, arraybuffer, blob, document, or text.
-    responseType: function(value) {
-      if (!arguments.length) return responseType;
-      responseType = value;
-      return request;
-    },
-
-    timeout: function(value) {
-      if (!arguments.length) return timeout;
-      timeout = +value;
-      return request;
-    },
-
-    user: function(value) {
-      return arguments.length < 1 ? user : (user = value == null ? null : value + "", request);
-    },
-
-    password: function(value) {
-      return arguments.length < 1 ? password : (password = value == null ? null : value + "", request);
-    },
-
-    // Specify how to convert the response content to a specific type;
-    // changes the callback value on "load" events.
-    response: function(value) {
-      response = value;
-      return request;
-    },
-
-    // Alias for send("GET", …).
-    get: function(data, callback) {
-      return request.send("GET", data, callback);
-    },
-
-    // Alias for send("POST", …).
-    post: function(data, callback) {
-      return request.send("POST", data, callback);
-    },
-
-    // If callback is non-null, it will be used for error and load events.
-    send: function(method, data, callback) {
-      xhr.open(method, url, true, user, password);
-      if (mimeType != null && !headers.has("accept")) headers.set("accept", mimeType + ",*/*");
-      if (xhr.setRequestHeader) headers.each(function(value, name) { xhr.setRequestHeader(name, value); });
-      if (mimeType != null && xhr.overrideMimeType) xhr.overrideMimeType(mimeType);
-      if (responseType != null) xhr.responseType = responseType;
-      if (timeout > 0) xhr.timeout = timeout;
-      if (callback == null && typeof data === "function") callback = data, data = null;
-      if (callback != null && callback.length === 1) callback = fixCallback(callback);
-      if (callback != null) request.on("error", callback).on("load", function(xhr) { callback(null, xhr); });
-      event.call("beforesend", request, xhr);
-      xhr.send(data == null ? null : data);
-      return request;
-    },
-
-    abort: function() {
-      xhr.abort();
-      return request;
-    },
-
-    on: function() {
-      var value = event.on.apply(event, arguments);
-      return value === event ? request : value;
-    }
-  };
-
-  if (callback != null) {
-    if (typeof callback !== "function") throw new Error("invalid callback: " + callback);
-    return request.get(callback);
-  }
-
-  return request;
-};
-
-function fixCallback(callback) {
-  return function(error, xhr) {
-    callback(error == null ? xhr : null);
-  };
-}
-
-function hasResponse(xhr) {
-  var type = xhr.responseType;
-  return type && type !== "text"
-      ? xhr.response // null on error
-      : xhr.responseText; // "" on error
-}
-
-var type$1 = function(defaultMimeType, response) {
-  return function(url, callback) {
-    var r = request(url).mimeType(defaultMimeType).response(response);
-    if (callback != null) {
-      if (typeof callback !== "function") throw new Error("invalid callback: " + callback);
-      return r.get(callback);
-    }
-    return r;
-  };
-};
-
-var html = type$1("text/html", function(xhr) {
-  return document.createRange().createContextualFragment(xhr.responseText);
-});
-
-var json = type$1("application/json", function(xhr) {
-  return JSON.parse(xhr.responseText);
-});
-
-var text = type$1("text/plain", function(xhr) {
-  return xhr.responseText;
-});
-
-var xml = type$1("application/xml", function(xhr) {
-  var xml = xhr.responseXML;
-  if (!xml) throw new Error("parse error");
-  return xml;
-});
-
-var dsv$1 = function(defaultMimeType, parse) {
-  return function(url, row, callback) {
-    if (arguments.length < 3) callback = row, row = null;
-    var r = request(url).mimeType(defaultMimeType);
-    r.row = function(_) { return arguments.length ? r.response(responseOf(parse, row = _)) : row; };
-    r.row(row);
-    return callback ? r.get(callback) : r;
-  };
-};
-
-function responseOf(parse, row) {
-  return function(request$$1) {
-    return parse(request$$1.responseText, row);
-  };
-}
-
-var csv$1 = dsv$1("text/csv", csvParse);
-
-var tsv$1 = dsv$1("text/tab-separated-values", tsvParse);
-
-var array$2 = Array.prototype;
+var array$3 = Array.prototype;
 
-var map$3 = array$2.map;
-var slice$5 = array$2.slice;
+var map$2 = array$3.map;
+var slice$5 = array$3.slice;
 
 var implicit = {name: "implicit"};
 
@@ -11685,22 +11976,22 @@ function point$1() {
   return pointish(band().paddingInner(1));
 }
 
-var constant$9 = function(x) {
+function constant$a(x) {
   return function() {
     return x;
   };
-};
+}
 
-var number$2 = function(x) {
+function number$2(x) {
   return +x;
-};
+}
 
 var unit = [0, 1];
 
 function deinterpolateLinear(a, b) {
   return (b -= (a = +a))
       ? function(x) { return (x - a) / b; }
-      : constant$9(b);
+      : constant$a(b);
 }
 
 function deinterpolateClamp(deinterpolate) {
@@ -11762,26 +12053,26 @@ function continuous(deinterpolate, reinterpolate) {
       range = unit,
       interpolate$$1 = interpolateValue,
       clamp = false,
-      piecewise,
+      piecewise$$1,
       output,
       input;
 
   function rescale() {
-    piecewise = Math.min(domain.length, range.length) > 2 ? polymap : bimap;
+    piecewise$$1 = Math.min(domain.length, range.length) > 2 ? polymap : bimap;
     output = input = null;
     return scale;
   }
 
   function scale(x) {
-    return (output || (output = piecewise(domain, range, clamp ? deinterpolateClamp(deinterpolate) : deinterpolate, interpolate$$1)))(+x);
+    return (output || (output = piecewise$$1(domain, range, clamp ? deinterpolateClamp(deinterpolate) : deinterpolate, interpolate$$1)))(+x);
   }
 
   scale.invert = function(y) {
-    return (input || (input = piecewise(range, domain, deinterpolateLinear, clamp ? reinterpolateClamp(reinterpolate) : reinterpolate)))(+y);
+    return (input || (input = piecewise$$1(range, domain, deinterpolateLinear, clamp ? reinterpolateClamp(reinterpolate) : reinterpolate)))(+y);
   };
 
   scale.domain = function(_) {
-    return arguments.length ? (domain = map$3.call(_, number$2), rescale()) : domain.slice();
+    return arguments.length ? (domain = map$2.call(_, number$2), rescale()) : domain.slice();
   };
 
   scale.range = function(_) {
@@ -11803,7 +12094,7 @@ function continuous(deinterpolate, reinterpolate) {
   return rescale();
 }
 
-var tickFormat = function(domain, count, specifier) {
+function tickFormat(domain, count, specifier) {
   var start = domain[0],
       stop = domain[domain.length - 1],
       step = tickStep(start, stop, count == null ? 10 : count),
@@ -11830,7 +12121,7 @@ var tickFormat = function(domain, count, specifier) {
     }
   }
   return exports.format(specifier);
-};
+}
 
 function linearish(scale) {
   var domain = scale.domain;
@@ -11888,7 +12179,7 @@ function linearish(scale) {
 }
 
 function linear$2() {
-  var scale = continuous(deinterpolateLinear, reinterpolate);
+  var scale = continuous(deinterpolateLinear, interpolateNumber);
 
   scale.copy = function() {
     return copy(scale, linear$2());
@@ -11907,7 +12198,7 @@ function identity$6() {
   scale.invert = scale;
 
   scale.domain = scale.range = function(_) {
-    return arguments.length ? (domain = map$3.call(_, number$2), scale) : domain.slice();
+    return arguments.length ? (domain = map$2.call(_, number$2), scale) : domain.slice();
   };
 
   scale.copy = function() {
@@ -11917,7 +12208,7 @@ function identity$6() {
   return linearish(scale);
 }
 
-var nice = function(domain, interval) {
+function nice(domain, interval) {
   domain = domain.slice();
 
   var i0 = 0,
@@ -11934,15 +12225,15 @@ var nice = function(domain, interval) {
   domain[i0] = interval.floor(x0);
   domain[i1] = interval.ceil(x1);
   return domain;
-};
+}
 
 function deinterpolate(a, b) {
   return (b = Math.log(b / a))
       ? function(x) { return Math.log(x / a) / b; }
-      : constant$9(b);
+      : constant$a(b);
 }
 
-function reinterpolate$1(a, b) {
+function reinterpolate(a, b) {
   return a < 0
       ? function(t) { return -Math.pow(-b, t) * Math.pow(-a, 1 - t); }
       : function(t) { return Math.pow(b, t) * Math.pow(a, 1 - t); };
@@ -11972,7 +12263,7 @@ function reflect(f) {
 }
 
 function log$1() {
-  var scale = continuous(deinterpolate, reinterpolate$1).domain([1, 10]),
+  var scale = continuous(deinterpolate, reinterpolate).domain([1, 10]),
       domain = scale.domain,
       base = 10,
       logs = logp(10),
@@ -12071,7 +12362,7 @@ function pow$1() {
   function deinterpolate(a, b) {
     return (b = raise$1(b, exponent) - (a = raise$1(a, exponent)))
         ? function(x) { return (raise$1(x, exponent) - a) / b; }
-        : constant$9(b);
+        : constant$a(b);
   }
 
   function reinterpolate(a, b) {
@@ -12217,8 +12508,8 @@ function threshold$1() {
   return scale;
 }
 
-var t0$1 = new Date;
-var t1$1 = new Date;
+var t0$1 = new Date,
+    t1$1 = new Date;
 
 function newInterval(floori, offseti, count, field) {
 
@@ -12307,51 +12598,47 @@ millisecond.every = function(k) {
     return (end - start) / k;
   });
 };
-
 var milliseconds = millisecond.range;
 
-var durationSecond$1 = 1e3;
-var durationMinute$1 = 6e4;
-var durationHour$1 = 36e5;
-var durationDay$1 = 864e5;
-var durationWeek$1 = 6048e5;
+var durationSecond = 1e3;
+var durationMinute = 6e4;
+var durationHour = 36e5;
+var durationDay = 864e5;
+var durationWeek = 6048e5;
 
 var second = newInterval(function(date) {
-  date.setTime(Math.floor(date / durationSecond$1) * durationSecond$1);
+  date.setTime(Math.floor(date / durationSecond) * durationSecond);
 }, function(date, step) {
-  date.setTime(+date + step * durationSecond$1);
+  date.setTime(+date + step * durationSecond);
 }, function(start, end) {
-  return (end - start) / durationSecond$1;
+  return (end - start) / durationSecond;
 }, function(date) {
   return date.getUTCSeconds();
 });
-
 var seconds = second.range;
 
 var minute = newInterval(function(date) {
-  date.setTime(Math.floor(date / durationMinute$1) * durationMinute$1);
+  date.setTime(Math.floor(date / durationMinute) * durationMinute);
 }, function(date, step) {
-  date.setTime(+date + step * durationMinute$1);
+  date.setTime(+date + step * durationMinute);
 }, function(start, end) {
-  return (end - start) / durationMinute$1;
+  return (end - start) / durationMinute;
 }, function(date) {
   return date.getMinutes();
 });
-
 var minutes = minute.range;
 
 var hour = newInterval(function(date) {
-  var offset = date.getTimezoneOffset() * durationMinute$1 % durationHour$1;
-  if (offset < 0) offset += durationHour$1;
-  date.setTime(Math.floor((+date - offset) / durationHour$1) * durationHour$1 + offset);
+  var offset = date.getTimezoneOffset() * durationMinute % durationHour;
+  if (offset < 0) offset += durationHour;
+  date.setTime(Math.floor((+date - offset) / durationHour) * durationHour + offset);
 }, function(date, step) {
-  date.setTime(+date + step * durationHour$1);
+  date.setTime(+date + step * durationHour);
 }, function(start, end) {
-  return (end - start) / durationHour$1;
+  return (end - start) / durationHour;
 }, function(date) {
   return date.getHours();
 });
-
 var hours = hour.range;
 
 var day = newInterval(function(date) {
@@ -12359,11 +12646,10 @@ var day = newInterval(function(date) {
 }, function(date, step) {
   date.setDate(date.getDate() + step);
 }, function(start, end) {
-  return (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * durationMinute$1) / durationDay$1;
+  return (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * durationMinute) / durationDay;
 }, function(date) {
   return date.getDate() - 1;
 });
-
 var days = day.range;
 
 function weekday(i) {
@@ -12373,7 +12659,7 @@ function weekday(i) {
   }, function(date, step) {
     date.setDate(date.getDate() + step * 7);
   }, function(start, end) {
-    return (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * durationMinute$1) / durationWeek$1;
+    return (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * durationMinute) / durationWeek;
   });
 }
 
@@ -12403,7 +12689,6 @@ var month = newInterval(function(date) {
 }, function(date) {
   return date.getMonth();
 });
-
 var months = month.range;
 
 var year = newInterval(function(date) {
@@ -12427,31 +12712,28 @@ year.every = function(k) {
     date.setFullYear(date.getFullYear() + step * k);
   });
 };
-
 var years = year.range;
 
 var utcMinute = newInterval(function(date) {
   date.setUTCSeconds(0, 0);
 }, function(date, step) {
-  date.setTime(+date + step * durationMinute$1);
+  date.setTime(+date + step * durationMinute);
 }, function(start, end) {
-  return (end - start) / durationMinute$1;
+  return (end - start) / durationMinute;
 }, function(date) {
   return date.getUTCMinutes();
 });
-
 var utcMinutes = utcMinute.range;
 
 var utcHour = newInterval(function(date) {
   date.setUTCMinutes(0, 0, 0);
 }, function(date, step) {
-  date.setTime(+date + step * durationHour$1);
+  date.setTime(+date + step * durationHour);
 }, function(start, end) {
-  return (end - start) / durationHour$1;
+  return (end - start) / durationHour;
 }, function(date) {
   return date.getUTCHours();
 });
-
 var utcHours = utcHour.range;
 
 var utcDay = newInterval(function(date) {
@@ -12459,11 +12741,10 @@ var utcDay = newInterval(function(date) {
 }, function(date, step) {
   date.setUTCDate(date.getUTCDate() + step);
 }, function(start, end) {
-  return (end - start) / durationDay$1;
+  return (end - start) / durationDay;
 }, function(date) {
   return date.getUTCDate() - 1;
 });
-
 var utcDays = utcDay.range;
 
 function utcWeekday(i) {
@@ -12473,7 +12754,7 @@ function utcWeekday(i) {
   }, function(date, step) {
     date.setUTCDate(date.getUTCDate() + step * 7);
   }, function(start, end) {
-    return (end - start) / durationWeek$1;
+    return (end - start) / durationWeek;
   });
 }
 
@@ -12503,7 +12784,6 @@ var utcMonth = newInterval(function(date) {
 }, function(date) {
   return date.getUTCMonth();
 });
-
 var utcMonths = utcMonth.range;
 
 var utcYear = newInterval(function(date) {
@@ -12527,7 +12807,6 @@ utcYear.every = function(k) {
     date.setUTCFullYear(date.getUTCFullYear() + step * k);
   });
 };
-
 var utcYears = utcYear.range;
 
 function localDate(d) {
@@ -12880,10 +13159,10 @@ function formatLocale$1(locale) {
   };
 }
 
-var pads = {"-": "", "_": " ", "0": "0"};
-var numberRe = /^\s*\d+/;
-var percentRe = /^%/;
-var requoteRe = /[\\^$*+?|[\]().{}]/g;
+var pads = {"-": "", "_": " ", "0": "0"},
+    numberRe = /^\s*\d+/, // note: ignores next directive
+    percentRe = /^%/,
+    requoteRe = /[\\^$*+?|[\]().{}]/g;
 
 function pad(value, fill, width) {
   var sign = value < 0 ? "-" : "",
@@ -13160,10 +13439,6 @@ function formatUnixTimestampSeconds(d) {
 
 var locale$1;
 
-
-
-
-
 defaultLocale$1({
   dateTime: "%x, %X",
   date: "%-m/%-d/%Y",
@@ -13203,13 +13478,13 @@ var parseIso = +new Date("2000-01-01T00:00:00.000Z")
     ? parseIsoNative
     : exports.utcParse(isoSpecifier);
 
-var durationSecond = 1000;
-var durationMinute = durationSecond * 60;
-var durationHour = durationMinute * 60;
-var durationDay = durationHour * 24;
-var durationWeek = durationDay * 7;
-var durationMonth = durationDay * 30;
-var durationYear = durationDay * 365;
+var durationSecond$1 = 1000,
+    durationMinute$1 = durationSecond$1 * 60,
+    durationHour$1 = durationMinute$1 * 60,
+    durationDay$1 = durationHour$1 * 24,
+    durationWeek$1 = durationDay$1 * 7,
+    durationMonth = durationDay$1 * 30,
+    durationYear = durationDay$1 * 365;
 
 function date$1(t) {
   return new Date(t);
@@ -13220,7 +13495,7 @@ function number$3(t) {
 }
 
 function calendar(year$$1, month$$1, week, day$$1, hour$$1, minute$$1, second$$1, millisecond$$1, format) {
-  var scale = continuous(deinterpolateLinear, reinterpolate),
+  var scale = continuous(deinterpolateLinear, interpolateNumber),
       invert = scale.invert,
       domain = scale.domain;
 
@@ -13234,34 +13509,34 @@ function calendar(year$$1, month$$1, week, day$$1, hour$$1, minute$$1, second$$1
       formatYear = format("%Y");
 
   var tickIntervals = [
-    [second$$1,  1,      durationSecond],
-    [second$$1,  5,  5 * durationSecond],
-    [second$$1, 15, 15 * durationSecond],
-    [second$$1, 30, 30 * durationSecond],
-    [minute$$1,  1,      durationMinute],
-    [minute$$1,  5,  5 * durationMinute],
-    [minute$$1, 15, 15 * durationMinute],
-    [minute$$1, 30, 30 * durationMinute],
-    [  hour$$1,  1,      durationHour  ],
-    [  hour$$1,  3,  3 * durationHour  ],
-    [  hour$$1,  6,  6 * durationHour  ],
-    [  hour$$1, 12, 12 * durationHour  ],
-    [   day$$1,  1,      durationDay   ],
-    [   day$$1,  2,  2 * durationDay   ],
-    [  week,  1,      durationWeek  ],
+    [second$$1,  1,      durationSecond$1],
+    [second$$1,  5,  5 * durationSecond$1],
+    [second$$1, 15, 15 * durationSecond$1],
+    [second$$1, 30, 30 * durationSecond$1],
+    [minute$$1,  1,      durationMinute$1],
+    [minute$$1,  5,  5 * durationMinute$1],
+    [minute$$1, 15, 15 * durationMinute$1],
+    [minute$$1, 30, 30 * durationMinute$1],
+    [  hour$$1,  1,      durationHour$1  ],
+    [  hour$$1,  3,  3 * durationHour$1  ],
+    [  hour$$1,  6,  6 * durationHour$1  ],
+    [  hour$$1, 12, 12 * durationHour$1  ],
+    [   day$$1,  1,      durationDay$1   ],
+    [   day$$1,  2,  2 * durationDay$1   ],
+    [  week,  1,      durationWeek$1  ],
     [ month$$1,  1,      durationMonth ],
     [ month$$1,  3,  3 * durationMonth ],
     [  year$$1,  1,      durationYear  ]
   ];
 
-  function tickFormat(date) {
-    return (second$$1(date) < date ? formatMillisecond
-        : minute$$1(date) < date ? formatSecond
-        : hour$$1(date) < date ? formatMinute
-        : day$$1(date) < date ? formatHour
-        : month$$1(date) < date ? (week(date) < date ? formatDay : formatWeek)
-        : year$$1(date) < date ? formatMonth
-        : formatYear)(date);
+  function tickFormat(date$$1) {
+    return (second$$1(date$$1) < date$$1 ? formatMillisecond
+        : minute$$1(date$$1) < date$$1 ? formatSecond
+        : hour$$1(date$$1) < date$$1 ? formatMinute
+        : day$$1(date$$1) < date$$1 ? formatHour
+        : month$$1(date$$1) < date$$1 ? (week(date$$1) < date$$1 ? formatDay : formatWeek)
+        : year$$1(date$$1) < date$$1 ? formatMonth
+        : formatYear)(date$$1);
   }
 
   function tickInterval(interval, start, stop, step) {
@@ -13294,7 +13569,7 @@ function calendar(year$$1, month$$1, week, day$$1, hour$$1, minute$$1, second$$1
   };
 
   scale.domain = function(_) {
-    return arguments.length ? domain(map$3.call(_, number$3)) : domain().map(date$1);
+    return arguments.length ? domain(map$2.call(_, number$3)) : domain().map(date$1);
   };
 
   scale.ticks = function(interval, step) {
@@ -13327,72 +13602,59 @@ function calendar(year$$1, month$$1, week, day$$1, hour$$1, minute$$1, second$$1
   return scale;
 }
 
-var time = function() {
+function time() {
   return calendar(year, month, sunday, day, hour, minute, second, millisecond, exports.timeFormat).domain([new Date(2000, 0, 1), new Date(2000, 0, 2)]);
-};
+}
 
-var utcTime = function() {
+function utcTime() {
   return calendar(utcYear, utcMonth, utcSunday, utcDay, utcHour, utcMinute, second, millisecond, exports.utcFormat).domain([Date.UTC(2000, 0, 1), Date.UTC(2000, 0, 2)]);
-};
-
-var colors = function(s) {
-  return s.match(/.{6}/g).map(function(x) {
-    return "#" + x;
-  });
-};
-
-var category10 = colors("1f77b4ff7f0e2ca02cd627289467bd8c564be377c27f7f7fbcbd2217becf");
-
-var category20b = colors("393b795254a36b6ecf9c9ede6379398ca252b5cf6bcedb9c8c6d31bd9e39e7ba52e7cb94843c39ad494ad6616be7969c7b4173a55194ce6dbdde9ed6");
-
-var category20c = colors("3182bd6baed69ecae1c6dbefe6550dfd8d3cfdae6bfdd0a231a35474c476a1d99bc7e9c0756bb19e9ac8bcbddcdadaeb636363969696bdbdbdd9d9d9");
-
-var category20 = colors("1f77b4aec7e8ff7f0effbb782ca02c98df8ad62728ff98969467bdc5b0d58c564bc49c94e377c2f7b6d27f7f7fc7c7c7bcbd22dbdb8d17becf9edae5");
-
-var cubehelix$3 = cubehelixLong(cubehelix(300, 0.5, 0.0), cubehelix(-240, 0.5, 1.0));
-
-var warm = cubehelixLong(cubehelix(-100, 0.75, 0.35), cubehelix(80, 1.50, 0.8));
-
-var cool = cubehelixLong(cubehelix(260, 0.75, 0.35), cubehelix(80, 1.50, 0.8));
+}
 
-var rainbow = cubehelix();
+function sequential(interpolator) {
+  var x0 = 0,
+      x1 = 1,
+      k10 = 1,
+      clamp = false;
 
-var rainbow$1 = function(t) {
-  if (t < 0 || t > 1) t -= Math.floor(t);
-  var ts = Math.abs(t - 0.5);
-  rainbow.h = 360 * t - 100;
-  rainbow.s = 1.5 - 1.5 * ts;
-  rainbow.l = 0.8 - 0.9 * ts;
-  return rainbow + "";
-};
+  function scale(x) {
+    var t = (x - x0) * k10;
+    return interpolator(clamp ? Math.max(0, Math.min(1, t)) : t);
+  }
 
-function ramp(range) {
-  var n = range.length;
-  return function(t) {
-    return range[Math.max(0, Math.min(n - 1, Math.floor(t * n)))];
+  scale.domain = function(_) {
+    return arguments.length ? (x0 = +_[0], x1 = +_[1], k10 = x0 === x1 ? 0 : 1 / (x1 - x0), scale) : [x0, x1];
   };
-}
 
-var viridis = ramp(colors("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"));
+  scale.clamp = function(_) {
+    return arguments.length ? (clamp = !!_, scale) : clamp;
+  };
 
-var magma = ramp(colors("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"));
+  scale.interpolator = function(_) {
+    return arguments.length ? (interpolator = _, scale) : interpolator;
+  };
 
-var inferno = ramp(colors("00000401000501010601010802010a02020c02020e03021004031204031405041706041907051b08051d09061f0a07220b07240c08260d08290e092b10092d110a30120a32140b34150b37160b39180c3c190c3e1b0c411c0c431e0c451f0c48210c4a230c4c240c4f260c51280b53290b552b0b572d0b592f0a5b310a5c320a5e340a5f3609613809623909633b09643d09653e0966400a67420a68440a68450a69470b6a490b6a4a0c6b4c0c6b4d0d6c4f0d6c510e6c520e6d540f6d550f6d57106e59106e5a116e5c126e5d126e5f136e61136e62146e64156e65156e67166e69166e6a176e6c186e6d186e6f196e71196e721a6e741a6e751b6e771c6d781c6d7a1d6d7c1d6d7d1e6d7f1e6c801f6c82206c84206b85216b87216b88226a8a226a8c23698d23698f24699025689225689326679526679727669827669a28659b29649d29649f2a63a02a63a22b62a32c61a52c60a62d60a82e5fa92e5eab2f5ead305dae305cb0315bb1325ab3325ab43359b63458b73557b93556ba3655bc3754bd3853bf3952c03a51c13a50c33b4fc43c4ec63d4dc73e4cc83f4bca404acb4149cc4248ce4347cf4446d04545d24644d34743d44842d54a41d74b3fd84c3ed94d3dda4e3cdb503bdd513ade5238df5337e05536e15635e25734e35933e45a31e55c30e65d2fe75e2ee8602de9612bea632aeb6429eb6628ec6726ed6925ee6a24ef6c23ef6e21f06f20f1711ff1731df2741cf3761bf37819f47918f57b17f57d15f67e14f68013f78212f78410f8850ff8870ef8890cf98b0bf98c0af98e09fa9008fa9207fa9407fb9606fb9706fb9906fb9b06fb9d07fc9f07fca108fca309fca50afca60cfca80dfcaa0ffcac11fcae12fcb014fcb216fcb418fbb61afbb81dfbba1ffbbc21fbbe23fac026fac228fac42afac62df9c72ff9c932f9cb35f8cd37f8cf3af7d13df7d340f6d543f6d746f5d949f5db4cf4dd4ff4df53f4e156f3e35af3e55df2e661f2e865f2ea69f1ec6df1ed71f1ef75f1f179f2f27df2f482f3f586f3f68af4f88ef5f992f6fa96f8fb9af9fc9dfafda1fcffa4"));
+  scale.copy = function() {
+    return sequential(interpolator).domain([x0, x1]).clamp(clamp);
+  };
 
-var plasma = ramp(colors("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"));
+  return linearish(scale);
+}
 
-function sequential(interpolator) {
+function diverging(interpolator) {
   var x0 = 0,
-      x1 = 1,
+      x1 = 0.5,
+      x2 = 1,
+      k10 = 1,
+      k21 = 1,
       clamp = false;
 
   function scale(x) {
-    var t = (x - x0) / (x1 - x0);
+    var t = 0.5 + ((x = +x) - x1) * (x < x1 ? k10 : k21);
     return interpolator(clamp ? Math.max(0, Math.min(1, t)) : t);
   }
 
   scale.domain = function(_) {
-    return arguments.length ? (x0 = +_[0], x1 = +_[1], scale) : [x0, x1];
+    return arguments.length ? (x0 = +_[0], x1 = +_[1], x2 = +_[2], k10 = x0 === x1 ? 0 : 0.5 / (x1 - x0), k21 = x1 === x2 ? 0 : 0.5 / (x2 - x1), scale) : [x0, x1, x2];
   };
 
   scale.clamp = function(_) {
@@ -13404,17 +13666,432 @@ function sequential(interpolator) {
   };
 
   scale.copy = function() {
-    return sequential(interpolator).domain([x0, x1]).clamp(clamp);
+    return diverging(interpolator).domain([x0, x1, x2]).clamp(clamp);
   };
 
   return linearish(scale);
 }
 
-var constant$10 = function(x) {
+function colors(specifier) {
+  var n = specifier.length / 6 | 0, colors = new Array(n), i = 0;
+  while (i < n) colors[i] = "#" + specifier.slice(i * 6, ++i * 6);
+  return colors;
+}
+
+var category10 = colors("1f77b4ff7f0e2ca02cd627289467bd8c564be377c27f7f7fbcbd2217becf");
+
+var Accent = colors("7fc97fbeaed4fdc086ffff99386cb0f0027fbf5b17666666");
+
+var Dark2 = colors("1b9e77d95f027570b3e7298a66a61ee6ab02a6761d666666");
+
+var Paired = colors("a6cee31f78b4b2df8a33a02cfb9a99e31a1cfdbf6fff7f00cab2d66a3d9affff99b15928");
+
+var Pastel1 = colors("fbb4aeb3cde3ccebc5decbe4fed9a6ffffcce5d8bdfddaecf2f2f2");
+
+var Pastel2 = colors("b3e2cdfdcdaccbd5e8f4cae4e6f5c9fff2aef1e2cccccccc");
+
+var Set1 = colors("e41a1c377eb84daf4a984ea3ff7f00ffff33a65628f781bf999999");
+
+var Set2 = colors("66c2a5fc8d628da0cbe78ac3a6d854ffd92fe5c494b3b3b3");
+
+var Set3 = colors("8dd3c7ffffb3bebadafb807280b1d3fdb462b3de69fccde5d9d9d9bc80bdccebc5ffed6f");
+
+function ramp(scheme) {
+  return rgbBasis(scheme[scheme.length - 1]);
+}
+
+var scheme = new Array(3).concat(
+  "d8b365f5f5f55ab4ac",
+  "a6611adfc27d80cdc1018571",
+  "a6611adfc27df5f5f580cdc1018571",
+  "8c510ad8b365f6e8c3c7eae55ab4ac01665e",
+  "8c510ad8b365f6e8c3f5f5f5c7eae55ab4ac01665e",
+  "8c510abf812ddfc27df6e8c3c7eae580cdc135978f01665e",
+  "8c510abf812ddfc27df6e8c3f5f5f5c7eae580cdc135978f01665e",
+  "5430058c510abf812ddfc27df6e8c3c7eae580cdc135978f01665e003c30",
+  "5430058c510abf812ddfc27df6e8c3f5f5f5c7eae580cdc135978f01665e003c30"
+).map(colors);
+
+var BrBG = ramp(scheme);
+
+var scheme$1 = new Array(3).concat(
+  "af8dc3f7f7f77fbf7b",
+  "7b3294c2a5cfa6dba0008837",
+  "7b3294c2a5cff7f7f7a6dba0008837",
+  "762a83af8dc3e7d4e8d9f0d37fbf7b1b7837",
+  "762a83af8dc3e7d4e8f7f7f7d9f0d37fbf7b1b7837",
+  "762a839970abc2a5cfe7d4e8d9f0d3a6dba05aae611b7837",
+  "762a839970abc2a5cfe7d4e8f7f7f7d9f0d3a6dba05aae611b7837",
+  "40004b762a839970abc2a5cfe7d4e8d9f0d3a6dba05aae611b783700441b",
+  "40004b762a839970abc2a5cfe7d4e8f7f7f7d9f0d3a6dba05aae611b783700441b"
+).map(colors);
+
+var PRGn = ramp(scheme$1);
+
+var scheme$2 = new Array(3).concat(
+  "e9a3c9f7f7f7a1d76a",
+  "d01c8bf1b6dab8e1864dac26",
+  "d01c8bf1b6daf7f7f7b8e1864dac26",
+  "c51b7de9a3c9fde0efe6f5d0a1d76a4d9221",
+  "c51b7de9a3c9fde0eff7f7f7e6f5d0a1d76a4d9221",
+  "c51b7dde77aef1b6dafde0efe6f5d0b8e1867fbc414d9221",
+  "c51b7dde77aef1b6dafde0eff7f7f7e6f5d0b8e1867fbc414d9221",
+  "8e0152c51b7dde77aef1b6dafde0efe6f5d0b8e1867fbc414d9221276419",
+  "8e0152c51b7dde77aef1b6dafde0eff7f7f7e6f5d0b8e1867fbc414d9221276419"
+).map(colors);
+
+var PiYG = ramp(scheme$2);
+
+var scheme$3 = new Array(3).concat(
+  "998ec3f7f7f7f1a340",
+  "5e3c99b2abd2fdb863e66101",
+  "5e3c99b2abd2f7f7f7fdb863e66101",
+  "542788998ec3d8daebfee0b6f1a340b35806",
+  "542788998ec3d8daebf7f7f7fee0b6f1a340b35806",
+  "5427888073acb2abd2d8daebfee0b6fdb863e08214b35806",
+  "5427888073acb2abd2d8daebf7f7f7fee0b6fdb863e08214b35806",
+  "2d004b5427888073acb2abd2d8daebfee0b6fdb863e08214b358067f3b08",
+  "2d004b5427888073acb2abd2d8daebf7f7f7fee0b6fdb863e08214b358067f3b08"
+).map(colors);
+
+var PuOr = ramp(scheme$3);
+
+var scheme$4 = new Array(3).concat(
+  "ef8a62f7f7f767a9cf",
+  "ca0020f4a58292c5de0571b0",
+  "ca0020f4a582f7f7f792c5de0571b0",
+  "b2182bef8a62fddbc7d1e5f067a9cf2166ac",
+  "b2182bef8a62fddbc7f7f7f7d1e5f067a9cf2166ac",
+  "b2182bd6604df4a582fddbc7d1e5f092c5de4393c32166ac",
+  "b2182bd6604df4a582fddbc7f7f7f7d1e5f092c5de4393c32166ac",
+  "67001fb2182bd6604df4a582fddbc7d1e5f092c5de4393c32166ac053061",
+  "67001fb2182bd6604df4a582fddbc7f7f7f7d1e5f092c5de4393c32166ac053061"
+).map(colors);
+
+var RdBu = ramp(scheme$4);
+
+var scheme$5 = new Array(3).concat(
+  "ef8a62ffffff999999",
+  "ca0020f4a582bababa404040",
+  "ca0020f4a582ffffffbababa404040",
+  "b2182bef8a62fddbc7e0e0e09999994d4d4d",
+  "b2182bef8a62fddbc7ffffffe0e0e09999994d4d4d",
+  "b2182bd6604df4a582fddbc7e0e0e0bababa8787874d4d4d",
+  "b2182bd6604df4a582fddbc7ffffffe0e0e0bababa8787874d4d4d",
+  "67001fb2182bd6604df4a582fddbc7e0e0e0bababa8787874d4d4d1a1a1a",
+  "67001fb2182bd6604df4a582fddbc7ffffffe0e0e0bababa8787874d4d4d1a1a1a"
+).map(colors);
+
+var RdGy = ramp(scheme$5);
+
+var scheme$6 = new Array(3).concat(
+  "fc8d59ffffbf91bfdb",
+  "d7191cfdae61abd9e92c7bb6",
+  "d7191cfdae61ffffbfabd9e92c7bb6",
+  "d73027fc8d59fee090e0f3f891bfdb4575b4",
+  "d73027fc8d59fee090ffffbfe0f3f891bfdb4575b4",
+  "d73027f46d43fdae61fee090e0f3f8abd9e974add14575b4",
+  "d73027f46d43fdae61fee090ffffbfe0f3f8abd9e974add14575b4",
+  "a50026d73027f46d43fdae61fee090e0f3f8abd9e974add14575b4313695",
+  "a50026d73027f46d43fdae61fee090ffffbfe0f3f8abd9e974add14575b4313695"
+).map(colors);
+
+var RdYlBu = ramp(scheme$6);
+
+var scheme$7 = new Array(3).concat(
+  "fc8d59ffffbf91cf60",
+  "d7191cfdae61a6d96a1a9641",
+  "d7191cfdae61ffffbfa6d96a1a9641",
+  "d73027fc8d59fee08bd9ef8b91cf601a9850",
+  "d73027fc8d59fee08bffffbfd9ef8b91cf601a9850",
+  "d73027f46d43fdae61fee08bd9ef8ba6d96a66bd631a9850",
+  "d73027f46d43fdae61fee08bffffbfd9ef8ba6d96a66bd631a9850",
+  "a50026d73027f46d43fdae61fee08bd9ef8ba6d96a66bd631a9850006837",
+  "a50026d73027f46d43fdae61fee08bffffbfd9ef8ba6d96a66bd631a9850006837"
+).map(colors);
+
+var RdYlGn = ramp(scheme$7);
+
+var scheme$8 = new Array(3).concat(
+  "fc8d59ffffbf99d594",
+  "d7191cfdae61abdda42b83ba",
+  "d7191cfdae61ffffbfabdda42b83ba",
+  "d53e4ffc8d59fee08be6f59899d5943288bd",
+  "d53e4ffc8d59fee08bffffbfe6f59899d5943288bd",
+  "d53e4ff46d43fdae61fee08be6f598abdda466c2a53288bd",
+  "d53e4ff46d43fdae61fee08bffffbfe6f598abdda466c2a53288bd",
+  "9e0142d53e4ff46d43fdae61fee08be6f598abdda466c2a53288bd5e4fa2",
+  "9e0142d53e4ff46d43fdae61fee08bffffbfe6f598abdda466c2a53288bd5e4fa2"
+).map(colors);
+
+var Spectral = ramp(scheme$8);
+
+var scheme$9 = new Array(3).concat(
+  "e5f5f999d8c92ca25f",
+  "edf8fbb2e2e266c2a4238b45",
+  "edf8fbb2e2e266c2a42ca25f006d2c",
+  "edf8fbccece699d8c966c2a42ca25f006d2c",
+  "edf8fbccece699d8c966c2a441ae76238b45005824",
+  "f7fcfde5f5f9ccece699d8c966c2a441ae76238b45005824",
+  "f7fcfde5f5f9ccece699d8c966c2a441ae76238b45006d2c00441b"
+).map(colors);
+
+var BuGn = ramp(scheme$9);
+
+var scheme$a = new Array(3).concat(
+  "e0ecf49ebcda8856a7",
+  "edf8fbb3cde38c96c688419d",
+  "edf8fbb3cde38c96c68856a7810f7c",
+  "edf8fbbfd3e69ebcda8c96c68856a7810f7c",
+  "edf8fbbfd3e69ebcda8c96c68c6bb188419d6e016b",
+  "f7fcfde0ecf4bfd3e69ebcda8c96c68c6bb188419d6e016b",
+  "f7fcfde0ecf4bfd3e69ebcda8c96c68c6bb188419d810f7c4d004b"
+).map(colors);
+
+var BuPu = ramp(scheme$a);
+
+var scheme$b = new Array(3).concat(
+  "e0f3dba8ddb543a2ca",
+  "f0f9e8bae4bc7bccc42b8cbe",
+  "f0f9e8bae4bc7bccc443a2ca0868ac",
+  "f0f9e8ccebc5a8ddb57bccc443a2ca0868ac",
+  "f0f9e8ccebc5a8ddb57bccc44eb3d32b8cbe08589e",
+  "f7fcf0e0f3dbccebc5a8ddb57bccc44eb3d32b8cbe08589e",
+  "f7fcf0e0f3dbccebc5a8ddb57bccc44eb3d32b8cbe0868ac084081"
+).map(colors);
+
+var GnBu = ramp(scheme$b);
+
+var scheme$c = new Array(3).concat(
+  "fee8c8fdbb84e34a33",
+  "fef0d9fdcc8afc8d59d7301f",
+  "fef0d9fdcc8afc8d59e34a33b30000",
+  "fef0d9fdd49efdbb84fc8d59e34a33b30000",
+  "fef0d9fdd49efdbb84fc8d59ef6548d7301f990000",
+  "fff7ecfee8c8fdd49efdbb84fc8d59ef6548d7301f990000",
+  "fff7ecfee8c8fdd49efdbb84fc8d59ef6548d7301fb300007f0000"
+).map(colors);
+
+var OrRd = ramp(scheme$c);
+
+var scheme$d = new Array(3).concat(
+  "ece2f0a6bddb1c9099",
+  "f6eff7bdc9e167a9cf02818a",
+  "f6eff7bdc9e167a9cf1c9099016c59",
+  "f6eff7d0d1e6a6bddb67a9cf1c9099016c59",
+  "f6eff7d0d1e6a6bddb67a9cf3690c002818a016450",
+  "fff7fbece2f0d0d1e6a6bddb67a9cf3690c002818a016450",
+  "fff7fbece2f0d0d1e6a6bddb67a9cf3690c002818a016c59014636"
+).map(colors);
+
+var PuBuGn = ramp(scheme$d);
+
+var scheme$e = new Array(3).concat(
+  "ece7f2a6bddb2b8cbe",
+  "f1eef6bdc9e174a9cf0570b0",
+  "f1eef6bdc9e174a9cf2b8cbe045a8d",
+  "f1eef6d0d1e6a6bddb74a9cf2b8cbe045a8d",
+  "f1eef6d0d1e6a6bddb74a9cf3690c00570b0034e7b",
+  "fff7fbece7f2d0d1e6a6bddb74a9cf3690c00570b0034e7b",
+  "fff7fbece7f2d0d1e6a6bddb74a9cf3690c00570b0045a8d023858"
+).map(colors);
+
+var PuBu = ramp(scheme$e);
+
+var scheme$f = new Array(3).concat(
+  "e7e1efc994c7dd1c77",
+  "f1eef6d7b5d8df65b0ce1256",
+  "f1eef6d7b5d8df65b0dd1c77980043",
+  "f1eef6d4b9dac994c7df65b0dd1c77980043",
+  "f1eef6d4b9dac994c7df65b0e7298ace125691003f",
+  "f7f4f9e7e1efd4b9dac994c7df65b0e7298ace125691003f",
+  "f7f4f9e7e1efd4b9dac994c7df65b0e7298ace125698004367001f"
+).map(colors);
+
+var PuRd = ramp(scheme$f);
+
+var scheme$g = new Array(3).concat(
+  "fde0ddfa9fb5c51b8a",
+  "feebe2fbb4b9f768a1ae017e",
+  "feebe2fbb4b9f768a1c51b8a7a0177",
+  "feebe2fcc5c0fa9fb5f768a1c51b8a7a0177",
+  "feebe2fcc5c0fa9fb5f768a1dd3497ae017e7a0177",
+  "fff7f3fde0ddfcc5c0fa9fb5f768a1dd3497ae017e7a0177",
+  "fff7f3fde0ddfcc5c0fa9fb5f768a1dd3497ae017e7a017749006a"
+).map(colors);
+
+var RdPu = ramp(scheme$g);
+
+var scheme$h = new Array(3).concat(
+  "edf8b17fcdbb2c7fb8",
+  "ffffcca1dab441b6c4225ea8",
+  "ffffcca1dab441b6c42c7fb8253494",
+  "ffffccc7e9b47fcdbb41b6c42c7fb8253494",
+  "ffffccc7e9b47fcdbb41b6c41d91c0225ea80c2c84",
+  "ffffd9edf8b1c7e9b47fcdbb41b6c41d91c0225ea80c2c84",
+  "ffffd9edf8b1c7e9b47fcdbb41b6c41d91c0225ea8253494081d58"
+).map(colors);
+
+var YlGnBu = ramp(scheme$h);
+
+var scheme$i = new Array(3).concat(
+  "f7fcb9addd8e31a354",
+  "ffffccc2e69978c679238443",
+  "ffffccc2e69978c67931a354006837",
+  "ffffccd9f0a3addd8e78c67931a354006837",
+  "ffffccd9f0a3addd8e78c67941ab5d238443005a32",
+  "ffffe5f7fcb9d9f0a3addd8e78c67941ab5d238443005a32",
+  "ffffe5f7fcb9d9f0a3addd8e78c67941ab5d238443006837004529"
+).map(colors);
+
+var YlGn = ramp(scheme$i);
+
+var scheme$j = new Array(3).concat(
+  "fff7bcfec44fd95f0e",
+  "ffffd4fed98efe9929cc4c02",
+  "ffffd4fed98efe9929d95f0e993404",
+  "ffffd4fee391fec44ffe9929d95f0e993404",
+  "ffffd4fee391fec44ffe9929ec7014cc4c028c2d04",
+  "ffffe5fff7bcfee391fec44ffe9929ec7014cc4c028c2d04",
+  "ffffe5fff7bcfee391fec44ffe9929ec7014cc4c02993404662506"
+).map(colors);
+
+var YlOrBr = ramp(scheme$j);
+
+var scheme$k = new Array(3).concat(
+  "ffeda0feb24cf03b20",
+  "ffffb2fecc5cfd8d3ce31a1c",
+  "ffffb2fecc5cfd8d3cf03b20bd0026",
+  "ffffb2fed976feb24cfd8d3cf03b20bd0026",
+  "ffffb2fed976feb24cfd8d3cfc4e2ae31a1cb10026",
+  "ffffccffeda0fed976feb24cfd8d3cfc4e2ae31a1cb10026",
+  "ffffccffeda0fed976feb24cfd8d3cfc4e2ae31a1cbd0026800026"
+).map(colors);
+
+var YlOrRd = ramp(scheme$k);
+
+var scheme$l = new Array(3).concat(
+  "deebf79ecae13182bd",
+  "eff3ffbdd7e76baed62171b5",
+  "eff3ffbdd7e76baed63182bd08519c",
+  "eff3ffc6dbef9ecae16baed63182bd08519c",
+  "eff3ffc6dbef9ecae16baed64292c62171b5084594",
+  "f7fbffdeebf7c6dbef9ecae16baed64292c62171b5084594",
+  "f7fbffdeebf7c6dbef9ecae16baed64292c62171b508519c08306b"
+).map(colors);
+
+var Blues = ramp(scheme$l);
+
+var scheme$m = new Array(3).concat(
+  "e5f5e0a1d99b31a354",
+  "edf8e9bae4b374c476238b45",
+  "edf8e9bae4b374c47631a354006d2c",
+  "edf8e9c7e9c0a1d99b74c47631a354006d2c",
+  "edf8e9c7e9c0a1d99b74c47641ab5d238b45005a32",
+  "f7fcf5e5f5e0c7e9c0a1d99b74c47641ab5d238b45005a32",
+  "f7fcf5e5f5e0c7e9c0a1d99b74c47641ab5d238b45006d2c00441b"
+).map(colors);
+
+var Greens = ramp(scheme$m);
+
+var scheme$n = new Array(3).concat(
+  "f0f0f0bdbdbd636363",
+  "f7f7f7cccccc969696525252",
+  "f7f7f7cccccc969696636363252525",
+  "f7f7f7d9d9d9bdbdbd969696636363252525",
+  "f7f7f7d9d9d9bdbdbd969696737373525252252525",
+  "fffffff0f0f0d9d9d9bdbdbd969696737373525252252525",
+  "fffffff0f0f0d9d9d9bdbdbd969696737373525252252525000000"
+).map(colors);
+
+var Greys = ramp(scheme$n);
+
+var scheme$o = new Array(3).concat(
+  "efedf5bcbddc756bb1",
+  "f2f0f7cbc9e29e9ac86a51a3",
+  "f2f0f7cbc9e29e9ac8756bb154278f",
+  "f2f0f7dadaebbcbddc9e9ac8756bb154278f",
+  "f2f0f7dadaebbcbddc9e9ac8807dba6a51a34a1486",
+  "fcfbfdefedf5dadaebbcbddc9e9ac8807dba6a51a34a1486",
+  "fcfbfdefedf5dadaebbcbddc9e9ac8807dba6a51a354278f3f007d"
+).map(colors);
+
+var Purples = ramp(scheme$o);
+
+var scheme$p = new Array(3).concat(
+  "fee0d2fc9272de2d26",
+  "fee5d9fcae91fb6a4acb181d",
+  "fee5d9fcae91fb6a4ade2d26a50f15",
+  "fee5d9fcbba1fc9272fb6a4ade2d26a50f15",
+  "fee5d9fcbba1fc9272fb6a4aef3b2ccb181d99000d",
+  "fff5f0fee0d2fcbba1fc9272fb6a4aef3b2ccb181d99000d",
+  "fff5f0fee0d2fcbba1fc9272fb6a4aef3b2ccb181da50f1567000d"
+).map(colors);
+
+var Reds = ramp(scheme$p);
+
+var scheme$q = new Array(3).concat(
+  "fee6cefdae6be6550d",
+  "feeddefdbe85fd8d3cd94701",
+  "feeddefdbe85fd8d3ce6550da63603",
+  "feeddefdd0a2fdae6bfd8d3ce6550da63603",
+  "feeddefdd0a2fdae6bfd8d3cf16913d948018c2d04",
+  "fff5ebfee6cefdd0a2fdae6bfd8d3cf16913d948018c2d04",
+  "fff5ebfee6cefdd0a2fdae6bfd8d3cf16913d94801a636037f2704"
+).map(colors);
+
+var Oranges = ramp(scheme$q);
+
+var cubehelix$3 = cubehelixLong(cubehelix(300, 0.5, 0.0), cubehelix(-240, 0.5, 1.0));
+
+var warm = cubehelixLong(cubehelix(-100, 0.75, 0.35), cubehelix(80, 1.50, 0.8));
+
+var cool = cubehelixLong(cubehelix(260, 0.75, 0.35), cubehelix(80, 1.50, 0.8));
+
+var c = cubehelix();
+
+function rainbow(t) {
+  if (t < 0 || t > 1) t -= Math.floor(t);
+  var ts = Math.abs(t - 0.5);
+  c.h = 360 * t - 100;
+  c.s = 1.5 - 1.5 * ts;
+  c.l = 0.8 - 0.9 * ts;
+  return c + "";
+}
+
+var c$1 = rgb(),
+    pi_1_3 = Math.PI / 3,
+    pi_2_3 = Math.PI * 2 / 3;
+
+function sinebow(t) {
+  var x;
+  t = (0.5 - t) * Math.PI;
+  c$1.r = 255 * (x = Math.sin(t)) * x;
+  c$1.g = 255 * (x = Math.sin(t + pi_1_3)) * x;
+  c$1.b = 255 * (x = Math.sin(t + pi_2_3)) * x;
+  return c$1 + "";
+}
+
+function ramp$1(range) {
+  var n = range.length;
+  return function(t) {
+    return range[Math.max(0, Math.min(n - 1, Math.floor(t * n)))];
+  };
+}
+
+var viridis = ramp$1(colors("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"));
+
+var magma = ramp$1(colors("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"));
+
+var inferno = ramp$1(colors("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"));
+
+var plasma = ramp$1(colors("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"));
+
+function constant$b(x) {
   return function constant() {
     return x;
   };
-};
+}
 
 var abs$1 = Math.abs;
 var atan2$1 = Math.atan2;
@@ -13507,10 +14184,10 @@ function cornerTangents(x0, y0, x1, y1, r1, rc, cw) {
   };
 }
 
-var arc = function() {
+function arc() {
   var innerRadius = arcInnerRadius,
       outerRadius = arcOuterRadius,
-      cornerRadius = constant$10(0),
+      cornerRadius = constant$b(0),
       padRadius = null,
       startAngle = arcStartAngle,
       endAngle = arcEndAngle,
@@ -13659,39 +14336,39 @@ var arc = function() {
   };
 
   arc.innerRadius = function(_) {
-    return arguments.length ? (innerRadius = typeof _ === "function" ? _ : constant$10(+_), arc) : innerRadius;
+    return arguments.length ? (innerRadius = typeof _ === "function" ? _ : constant$b(+_), arc) : innerRadius;
   };
 
   arc.outerRadius = function(_) {
-    return arguments.length ? (outerRadius = typeof _ === "function" ? _ : constant$10(+_), arc) : outerRadius;
+    return arguments.length ? (outerRadius = typeof _ === "function" ? _ : constant$b(+_), arc) : outerRadius;
   };
 
   arc.cornerRadius = function(_) {
-    return arguments.length ? (cornerRadius = typeof _ === "function" ? _ : constant$10(+_), arc) : cornerRadius;
+    return arguments.length ? (cornerRadius = typeof _ === "function" ? _ : constant$b(+_), arc) : cornerRadius;
   };
 
   arc.padRadius = function(_) {
-    return arguments.length ? (padRadius = _ == null ? null : typeof _ === "function" ? _ : constant$10(+_), arc) : padRadius;
+    return arguments.length ? (padRadius = _ == null ? null : typeof _ === "function" ? _ : constant$b(+_), arc) : padRadius;
   };
 
   arc.startAngle = function(_) {
-    return arguments.length ? (startAngle = typeof _ === "function" ? _ : constant$10(+_), arc) : startAngle;
+    return arguments.length ? (startAngle = typeof _ === "function" ? _ : constant$b(+_), arc) : startAngle;
   };
 
   arc.endAngle = function(_) {
-    return arguments.length ? (endAngle = typeof _ === "function" ? _ : constant$10(+_), arc) : endAngle;
+    return arguments.length ? (endAngle = typeof _ === "function" ? _ : constant$b(+_), arc) : endAngle;
   };
 
   arc.padAngle = function(_) {
-    return arguments.length ? (padAngle = typeof _ === "function" ? _ : constant$10(+_), arc) : padAngle;
+    return arguments.length ? (padAngle = typeof _ === "function" ? _ : constant$b(+_), arc) : padAngle;
   };
 
   arc.context = function(_) {
-    return arguments.length ? (context = _ == null ? null : _, arc) : context;
+    return arguments.length ? ((context = _ == null ? null : _), arc) : context;
   };
 
   return arc;
-};
+}
 
 function Linear(context) {
   this._context = context;
@@ -13721,9 +14398,9 @@ Linear.prototype = {
   }
 };
 
-var curveLinear = function(context) {
+function curveLinear(context) {
   return new Linear(context);
-};
+}
 
 function x$3(p) {
   return p[0];
@@ -13733,10 +14410,10 @@ function y$3(p) {
   return p[1];
 }
 
-var line = function() {
+function line() {
   var x$$1 = x$3,
       y$$1 = y$3,
-      defined = constant$10(true),
+      defined = constant$b(true),
       context = null,
       curve = curveLinear,
       output = null;
@@ -13762,15 +14439,15 @@ var line = function() {
   }
 
   line.x = function(_) {
-    return arguments.length ? (x$$1 = typeof _ === "function" ? _ : constant$10(+_), line) : x$$1;
+    return arguments.length ? (x$$1 = typeof _ === "function" ? _ : constant$b(+_), line) : x$$1;
   };
 
   line.y = function(_) {
-    return arguments.length ? (y$$1 = typeof _ === "function" ? _ : constant$10(+_), line) : y$$1;
+    return arguments.length ? (y$$1 = typeof _ === "function" ? _ : constant$b(+_), line) : y$$1;
   };
 
   line.defined = function(_) {
-    return arguments.length ? (defined = typeof _ === "function" ? _ : constant$10(!!_), line) : defined;
+    return arguments.length ? (defined = typeof _ === "function" ? _ : constant$b(!!_), line) : defined;
   };
 
   line.curve = function(_) {
@@ -13782,14 +14459,14 @@ var line = function() {
   };
 
   return line;
-};
+}
 
-var area$2 = function() {
+function area$3() {
   var x0 = x$3,
       x1 = null,
-      y0 = constant$10(0),
+      y0 = constant$b(0),
       y1 = y$3,
-      defined = constant$10(true),
+      defined = constant$b(true),
       context = null,
       curve = curveLinear,
       output = null;
@@ -13837,27 +14514,27 @@ var area$2 = function() {
   }
 
   area.x = function(_) {
-    return arguments.length ? (x0 = typeof _ === "function" ? _ : constant$10(+_), x1 = null, area) : x0;
+    return arguments.length ? (x0 = typeof _ === "function" ? _ : constant$b(+_), x1 = null, area) : x0;
   };
 
   area.x0 = function(_) {
-    return arguments.length ? (x0 = typeof _ === "function" ? _ : constant$10(+_), area) : x0;
+    return arguments.length ? (x0 = typeof _ === "function" ? _ : constant$b(+_), area) : x0;
   };
 
   area.x1 = function(_) {
-    return arguments.length ? (x1 = _ == null ? null : typeof _ === "function" ? _ : constant$10(+_), area) : x1;
+    return arguments.length ? (x1 = _ == null ? null : typeof _ === "function" ? _ : constant$b(+_), area) : x1;
   };
 
   area.y = function(_) {
-    return arguments.length ? (y0 = typeof _ === "function" ? _ : constant$10(+_), y1 = null, area) : y0;
+    return arguments.length ? (y0 = typeof _ === "function" ? _ : constant$b(+_), y1 = null, area) : y0;
   };
 
   area.y0 = function(_) {
-    return arguments.length ? (y0 = typeof _ === "function" ? _ : constant$10(+_), area) : y0;
+    return arguments.length ? (y0 = typeof _ === "function" ? _ : constant$b(+_), area) : y0;
   };
 
   area.y1 = function(_) {
-    return arguments.length ? (y1 = _ == null ? null : typeof _ === "function" ? _ : constant$10(+_), area) : y1;
+    return arguments.length ? (y1 = _ == null ? null : typeof _ === "function" ? _ : constant$b(+_), area) : y1;
   };
 
   area.lineX0 =
@@ -13874,7 +14551,7 @@ var area$2 = function() {
   };
 
   area.defined = function(_) {
-    return arguments.length ? (defined = typeof _ === "function" ? _ : constant$10(!!_), area) : defined;
+    return arguments.length ? (defined = typeof _ === "function" ? _ : constant$b(!!_), area) : defined;
   };
 
   area.curve = function(_) {
@@ -13886,23 +14563,23 @@ var area$2 = function() {
   };
 
   return area;
-};
+}
 
-var descending$1 = function(a, b) {
+function descending$1(a, b) {
   return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;
-};
+}
 
-var identity$7 = function(d) {
+function identity$7(d) {
   return d;
-};
+}
 
-var pie = function() {
+function pie() {
   var value = identity$7,
       sortValues = descending$1,
       sort = null,
-      startAngle = constant$10(0),
-      endAngle = constant$10(tau$4),
-      padAngle = constant$10(0);
+      startAngle = constant$b(0),
+      endAngle = constant$b(tau$4),
+      padAngle = constant$b(0);
 
   function pie(data) {
     var i,
@@ -13945,7 +14622,7 @@ var pie = function() {
   }
 
   pie.value = function(_) {
-    return arguments.length ? (value = typeof _ === "function" ? _ : constant$10(+_), pie) : value;
+    return arguments.length ? (value = typeof _ === "function" ? _ : constant$b(+_), pie) : value;
   };
 
   pie.sortValues = function(_) {
@@ -13957,19 +14634,19 @@ var pie = function() {
   };
 
   pie.startAngle = function(_) {
-    return arguments.length ? (startAngle = typeof _ === "function" ? _ : constant$10(+_), pie) : startAngle;
+    return arguments.length ? (startAngle = typeof _ === "function" ? _ : constant$b(+_), pie) : startAngle;
   };
 
   pie.endAngle = function(_) {
-    return arguments.length ? (endAngle = typeof _ === "function" ? _ : constant$10(+_), pie) : endAngle;
+    return arguments.length ? (endAngle = typeof _ === "function" ? _ : constant$b(+_), pie) : endAngle;
   };
 
   pie.padAngle = function(_) {
-    return arguments.length ? (padAngle = typeof _ === "function" ? _ : constant$10(+_), pie) : padAngle;
+    return arguments.length ? (padAngle = typeof _ === "function" ? _ : constant$b(+_), pie) : padAngle;
   };
 
   return pie;
-};
+}
 
 var curveRadialLinear = curveRadial(curveLinear);
 
@@ -14019,12 +14696,12 @@ function lineRadial(l) {
   return l;
 }
 
-var lineRadial$1 = function() {
+function lineRadial$1() {
   return lineRadial(line().curve(curveRadialLinear));
-};
+}
 
-var areaRadial = function() {
-  var a = area$2().curve(curveRadialLinear),
+function areaRadial() {
+  var a = area$3().curve(curveRadialLinear),
       c = a.curve,
       x0 = a.lineX0,
       x1 = a.lineX1,
@@ -14047,11 +14724,11 @@ var areaRadial = function() {
   };
 
   return a;
-};
+}
 
-var pointRadial = function(x, y) {
+function pointRadial(x, y) {
   return [(y = +y) * Math.cos(x -= Math.PI / 2), y * Math.sin(x)];
-};
+}
 
 var slice$6 = Array.prototype.slice;
 
@@ -14086,15 +14763,15 @@ function link$2(curve) {
   };
 
   link.x = function(_) {
-    return arguments.length ? (x$$1 = typeof _ === "function" ? _ : constant$10(+_), link) : x$$1;
+    return arguments.length ? (x$$1 = typeof _ === "function" ? _ : constant$b(+_), link) : x$$1;
   };
 
   link.y = function(_) {
-    return arguments.length ? (y$$1 = typeof _ === "function" ? _ : constant$10(+_), link) : y$$1;
+    return arguments.length ? (y$$1 = typeof _ === "function" ? _ : constant$b(+_), link) : y$$1;
   };
 
   link.context = function(_) {
-    return arguments.length ? (context = _ == null ? null : _, link) : context;
+    return arguments.length ? ((context = _ == null ? null : _), link) : context;
   };
 
   return link;
@@ -14161,8 +14838,8 @@ var cross$2 = {
   }
 };
 
-var tan30 = Math.sqrt(1 / 3);
-var tan30_2 = tan30 * 2;
+var tan30 = Math.sqrt(1 / 3),
+    tan30_2 = tan30 * 2;
 
 var diamond = {
   draw: function(context, size) {
@@ -14176,10 +14853,10 @@ var diamond = {
   }
 };
 
-var ka = 0.89081309152928522810;
-var kr = Math.sin(pi$4 / 10) / Math.sin(7 * pi$4 / 10);
-var kx = Math.sin(tau$4 / 10) * kr;
-var ky = -Math.cos(tau$4 / 10) * kr;
+var ka = 0.89081309152928522810,
+    kr = Math.sin(pi$4 / 10) / Math.sin(7 * pi$4 / 10),
+    kx = Math.sin(tau$4 / 10) * kr,
+    ky = -Math.cos(tau$4 / 10) * kr;
 
 var star = {
   draw: function(context, size) {
@@ -14219,10 +14896,10 @@ var triangle = {
   }
 };
 
-var c = -0.5;
-var s = Math.sqrt(3) / 2;
-var k = 1 / Math.sqrt(12);
-var a = (k / 2 + 1) * 3;
+var c$2 = -0.5,
+    s = Math.sqrt(3) / 2,
+    k = 1 / Math.sqrt(12),
+    a = (k / 2 + 1) * 3;
 
 var wye = {
   draw: function(context, size) {
@@ -14236,12 +14913,12 @@ var wye = {
     context.moveTo(x0, y0);
     context.lineTo(x1, y1);
     context.lineTo(x2, y2);
-    context.lineTo(c * x0 - s * y0, s * x0 + c * y0);
-    context.lineTo(c * x1 - s * y1, s * x1 + c * y1);
-    context.lineTo(c * x2 - s * y2, s * x2 + c * y2);
-    context.lineTo(c * x0 + s * y0, c * y0 - s * x0);
-    context.lineTo(c * x1 + s * y1, c * y1 - s * x1);
-    context.lineTo(c * x2 + s * y2, c * y2 - s * x2);
+    context.lineTo(c$2 * x0 - s * y0, s * x0 + c$2 * y0);
+    context.lineTo(c$2 * x1 - s * y1, s * x1 + c$2 * y1);
+    context.lineTo(c$2 * x2 - s * y2, s * x2 + c$2 * y2);
+    context.lineTo(c$2 * x0 + s * y0, c$2 * y0 - s * x0);
+    context.lineTo(c$2 * x1 + s * y1, c$2 * y1 - s * x1);
+    context.lineTo(c$2 * x2 + s * y2, c$2 * y2 - s * x2);
     context.closePath();
   }
 };
@@ -14256,9 +14933,9 @@ var symbols = [
   wye
 ];
 
-var symbol = function() {
-  var type = constant$10(circle$2),
-      size = constant$10(64),
+function symbol() {
+  var type = constant$b(circle$2),
+      size = constant$b(64),
       context = null;
 
   function symbol() {
@@ -14269,11 +14946,11 @@ var symbol = function() {
   }
 
   symbol.type = function(_) {
-    return arguments.length ? (type = typeof _ === "function" ? _ : constant$10(_), symbol) : type;
+    return arguments.length ? (type = typeof _ === "function" ? _ : constant$b(_), symbol) : type;
   };
 
   symbol.size = function(_) {
-    return arguments.length ? (size = typeof _ === "function" ? _ : constant$10(+_), symbol) : size;
+    return arguments.length ? (size = typeof _ === "function" ? _ : constant$b(+_), symbol) : size;
   };
 
   symbol.context = function(_) {
@@ -14281,9 +14958,9 @@ var symbol = function() {
   };
 
   return symbol;
-};
+}
 
-var noop$2 = function() {};
+function noop$3() {}
 
 function point$2(that, x, y) {
   that._context.bezierCurveTo(
@@ -14333,17 +15010,17 @@ Basis.prototype = {
   }
 };
 
-var basis$2 = function(context) {
+function basis$2(context) {
   return new Basis(context);
-};
+}
 
 function BasisClosed(context) {
   this._context = context;
 }
 
 BasisClosed.prototype = {
-  areaStart: noop$2,
-  areaEnd: noop$2,
+  areaStart: noop$3,
+  areaEnd: noop$3,
   lineStart: function() {
     this._x0 = this._x1 = this._x2 = this._x3 = this._x4 =
     this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = NaN;
@@ -14383,9 +15060,9 @@ BasisClosed.prototype = {
   }
 };
 
-var basisClosed$1 = function(context) {
+function basisClosed$1(context) {
   return new BasisClosed(context);
-};
+}
 
 function BasisOpen(context) {
   this._context = context;
@@ -14421,9 +15098,9 @@ BasisOpen.prototype = {
   }
 };
 
-var basisOpen = function(context) {
+function basisOpen(context) {
   return new BasisOpen(context);
-};
+}
 
 function Bundle(context, beta) {
   this._basis = new Basis(context);
@@ -14548,8 +15225,8 @@ function CardinalClosed(context, tension) {
 }
 
 CardinalClosed.prototype = {
-  areaStart: noop$2,
-  areaEnd: noop$2,
+  areaStart: noop$3,
+  areaEnd: noop$3,
   lineStart: function() {
     this._x0 = this._x1 = this._x2 = this._x3 = this._x4 = this._x5 =
     this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = this._y5 = NaN;
@@ -14741,8 +15418,8 @@ function CatmullRomClosed(context, alpha) {
 }
 
 CatmullRomClosed.prototype = {
-  areaStart: noop$2,
-  areaEnd: noop$2,
+  areaStart: noop$3,
+  areaEnd: noop$3,
   lineStart: function() {
     this._x0 = this._x1 = this._x2 = this._x3 = this._x4 = this._x5 =
     this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = this._y5 = NaN;
@@ -14871,8 +15548,8 @@ function LinearClosed(context) {
 }
 
 LinearClosed.prototype = {
-  areaStart: noop$2,
-  areaEnd: noop$2,
+  areaStart: noop$3,
+  areaEnd: noop$3,
   lineStart: function() {
     this._point = 0;
   },
@@ -14886,9 +15563,9 @@ LinearClosed.prototype = {
   }
 };
 
-var linearClosed = function(context) {
+function linearClosed(context) {
   return new LinearClosed(context);
-};
+}
 
 function sign$1(x) {
   return x < 0 ? -1 : 1;
@@ -15057,9 +15734,9 @@ function controlPoints(x) {
   return [a, b];
 }
 
-var natural = function(context) {
+function natural(context) {
   return new Natural(context);
-};
+}
 
 function Step(context, t) {
   this._context = context;
@@ -15103,9 +15780,9 @@ Step.prototype = {
   }
 };
 
-var step = function(context) {
+function step(context) {
   return new Step(context, 0.5);
-};
+}
 
 function stepBefore(context) {
   return new Step(context, 0);
@@ -15115,7 +15792,7 @@ function stepAfter(context) {
   return new Step(context, 1);
 }
 
-var none$1 = function(series, order) {
+function none$1(series, order) {
   if (!((n = series.length) > 1)) return;
   for (var i = 1, j, s0, s1 = series[order[0]], n, m = s1.length; i < n; ++i) {
     s0 = s1, s1 = series[order[i]];
@@ -15123,20 +15800,20 @@ var none$1 = function(series, order) {
       s1[j][1] += s1[j][0] = isNaN(s0[j][1]) ? s0[j][0] : s0[j][1];
     }
   }
-};
+}
 
-var none$2 = function(series) {
+function none$2(series) {
   var n = series.length, o = new Array(n);
   while (--n >= 0) o[n] = n;
   return o;
-};
+}
 
 function stackValue(d, key) {
   return d[key];
 }
 
-var stack = function() {
-  var keys = constant$10([]),
+function stack() {
+  var keys = constant$b([]),
       order = none$2,
       offset = none$1,
       value = stackValue;
@@ -15166,15 +15843,15 @@ var stack = function() {
   }
 
   stack.keys = function(_) {
-    return arguments.length ? (keys = typeof _ === "function" ? _ : constant$10(slice$6.call(_)), stack) : keys;
+    return arguments.length ? (keys = typeof _ === "function" ? _ : constant$b(slice$6.call(_)), stack) : keys;
   };
 
   stack.value = function(_) {
-    return arguments.length ? (value = typeof _ === "function" ? _ : constant$10(+_), stack) : value;
+    return arguments.length ? (value = typeof _ === "function" ? _ : constant$b(+_), stack) : value;
   };
 
   stack.order = function(_) {
-    return arguments.length ? (order = _ == null ? none$2 : typeof _ === "function" ? _ : constant$10(slice$6.call(_)), stack) : order;
+    return arguments.length ? (order = _ == null ? none$2 : typeof _ === "function" ? _ : constant$b(slice$6.call(_)), stack) : order;
   };
 
   stack.offset = function(_) {
@@ -15182,18 +15859,18 @@ var stack = function() {
   };
 
   return stack;
-};
+}
 
-var expand = function(series, order) {
+function expand(series, order) {
   if (!((n = series.length) > 0)) return;
   for (var i, n, j = 0, m = series[0].length, y; j < m; ++j) {
     for (y = i = 0; i < n; ++i) y += series[i][j][1] || 0;
     if (y) for (i = 0; i < n; ++i) series[i][j][1] /= y;
   }
   none$1(series, order);
-};
+}
 
-var diverging = function(series, order) {
+function diverging$1(series, order) {
   if (!((n = series.length) > 1)) return;
   for (var i, j = 0, d, dy, yp, yn, n, m = series[order[0]].length; j < m; ++j) {
     for (yp = yn = 0, i = 0; i < n; ++i) {
@@ -15206,18 +15883,18 @@ var diverging = function(series, order) {
       }
     }
   }
-};
+}
 
-var silhouette = function(series, order) {
+function silhouette(series, order) {
   if (!((n = series.length) > 0)) return;
   for (var j = 0, s0 = series[order[0]], n, m = s0.length; j < m; ++j) {
     for (var i = 0, y = 0; i < n; ++i) y += series[i][j][1] || 0;
     s0[j][1] += s0[j][0] = -y / 2;
   }
   none$1(series, order);
-};
+}
 
-var wiggle = function(series, order) {
+function wiggle(series, order) {
   if (!((n = series.length) > 0) || !((m = (s0 = series[order[0]]).length) > 0)) return;
   for (var y = 0, j = 1, s0, m, n; j < m; ++j) {
     for (var i = 0, s1 = 0, s2 = 0; i < n; ++i) {
@@ -15238,12 +15915,12 @@ var wiggle = function(series, order) {
   }
   s0[j - 1][1] += s0[j - 1][0] = y;
   none$1(series, order);
-};
+}
 
-var ascending$2 = function(series) {
+function ascending$3(series) {
   var sums = series.map(sum$2);
   return none$2(series).sort(function(a, b) { return sums[a] - sums[b]; });
-};
+}
 
 function sum$2(series) {
   var s = 0, i = -1, n = series.length, v;
@@ -15251,11 +15928,11 @@ function sum$2(series) {
   return s;
 }
 
-var descending$2 = function(series) {
-  return ascending$2(series).reverse();
-};
+function descending$2(series) {
+  return ascending$3(series).reverse();
+}
 
-var insideOut = function(series) {
+function insideOut(series) {
   var n = series.length,
       i,
       j,
@@ -15278,17 +15955,17 @@ var insideOut = function(series) {
   }
 
   return bottoms.reverse().concat(tops);
-};
+}
 
-var reverse = function(series) {
+function reverse(series) {
   return none$2(series).reverse();
-};
+}
 
-var constant$11 = function(x) {
+function constant$c(x) {
   return function() {
     return x;
   };
-};
+}
 
 function x$4(d) {
   return d[0];
@@ -16226,7 +16903,7 @@ Diagram.prototype = {
   }
 };
 
-var voronoi = function() {
+function voronoi() {
   var x$$1 = x$4,
       y$$1 = y$4,
       extent = null;
@@ -16253,11 +16930,11 @@ var voronoi = function() {
   };
 
   voronoi.x = function(_) {
-    return arguments.length ? (x$$1 = typeof _ === "function" ? _ : constant$11(+_), voronoi) : x$$1;
+    return arguments.length ? (x$$1 = typeof _ === "function" ? _ : constant$c(+_), voronoi) : x$$1;
   };
 
   voronoi.y = function(_) {
-    return arguments.length ? (y$$1 = typeof _ === "function" ? _ : constant$11(+_), voronoi) : y$$1;
+    return arguments.length ? (y$$1 = typeof _ === "function" ? _ : constant$c(+_), voronoi) : y$$1;
   };
 
   voronoi.extent = function(_) {
@@ -16269,13 +16946,13 @@ var voronoi = function() {
   };
 
   return voronoi;
-};
+}
 
-var constant$12 = function(x) {
+function constant$d(x) {
   return function() {
     return x;
   };
-};
+}
 
 function ZoomEvent(target, type, transform) {
   this.target = target;
@@ -16338,10 +17015,10 @@ function nopropagation$2() {
   exports.event.stopImmediatePropagation();
 }
 
-var noevent$2 = function() {
+function noevent$2() {
   exports.event.preventDefault();
   exports.event.stopImmediatePropagation();
-};
+}
 
 // Ignore right-click, since that should open the context menu.
 function defaultFilter$2() {
@@ -16373,18 +17050,18 @@ function defaultTouchable$1() {
   return "ontouchstart" in this;
 }
 
-function defaultConstrain(transform$$1, extent, translateExtent) {
-  var dx0 = transform$$1.invertX(extent[0][0]) - translateExtent[0][0],
-      dx1 = transform$$1.invertX(extent[1][0]) - translateExtent[1][0],
-      dy0 = transform$$1.invertY(extent[0][1]) - translateExtent[0][1],
-      dy1 = transform$$1.invertY(extent[1][1]) - translateExtent[1][1];
-  return transform$$1.translate(
+function defaultConstrain(transform, extent, translateExtent) {
+  var dx0 = transform.invertX(extent[0][0]) - translateExtent[0][0],
+      dx1 = transform.invertX(extent[1][0]) - translateExtent[1][0],
+      dy0 = transform.invertY(extent[0][1]) - translateExtent[0][1],
+      dy1 = transform.invertY(extent[1][1]) - translateExtent[1][1];
+  return transform.translate(
     dx1 > dx0 ? (dx0 + dx1) / 2 : Math.min(0, dx0) || Math.max(0, dx1),
     dy1 > dy0 ? (dy0 + dy1) / 2 : Math.min(0, dy0) || Math.max(0, dy1)
   );
 }
 
-var zoom = function() {
+function zoom() {
   var filter = defaultFilter$2,
       extent = defaultExtent$1,
       constrain = defaultConstrain,
@@ -16402,8 +17079,8 @@ var zoom = function() {
       wheelDelay = 150,
       clickDistance2 = 0;
 
-  function zoom(selection) {
-    selection
+  function zoom(selection$$1) {
+    selection$$1
         .property("__zoom", defaultTransform)
         .on("wheel.zoom", wheeled)
         .on("mousedown.zoom", mousedowned)
@@ -16416,31 +17093,31 @@ var zoom = function() {
         .style("-webkit-tap-highlight-color", "rgba(0,0,0,0)");
   }
 
-  zoom.transform = function(collection, transform$$1) {
-    var selection = collection.selection ? collection.selection() : collection;
-    selection.property("__zoom", defaultTransform);
-    if (collection !== selection) {
-      schedule(collection, transform$$1);
+  zoom.transform = function(collection, transform) {
+    var selection$$1 = collection.selection ? collection.selection() : collection;
+    selection$$1.property("__zoom", defaultTransform);
+    if (collection !== selection$$1) {
+      schedule(collection, transform);
     } else {
-      selection.interrupt().each(function() {
+      selection$$1.interrupt().each(function() {
         gesture(this, arguments)
             .start()
-            .zoom(null, typeof transform$$1 === "function" ? transform$$1.apply(this, arguments) : transform$$1)
+            .zoom(null, typeof transform === "function" ? transform.apply(this, arguments) : transform)
             .end();
       });
     }
   };
 
-  zoom.scaleBy = function(selection, k) {
-    zoom.scaleTo(selection, function() {
+  zoom.scaleBy = function(selection$$1, k) {
+    zoom.scaleTo(selection$$1, function() {
       var k0 = this.__zoom.k,
           k1 = typeof k === "function" ? k.apply(this, arguments) : k;
       return k0 * k1;
     });
   };
 
-  zoom.scaleTo = function(selection, k) {
-    zoom.transform(selection, function() {
+  zoom.scaleTo = function(selection$$1, k) {
+    zoom.transform(selection$$1, function() {
       var e = extent.apply(this, arguments),
           t0 = this.__zoom,
           p0 = centroid(e),
@@ -16450,8 +17127,8 @@ var zoom = function() {
     });
   };
 
-  zoom.translateBy = function(selection, x, y) {
-    zoom.transform(selection, function() {
+  zoom.translateBy = function(selection$$1, x, y) {
+    zoom.transform(selection$$1, function() {
       return constrain(this.__zoom.translate(
         typeof x === "function" ? x.apply(this, arguments) : x,
         typeof y === "function" ? y.apply(this, arguments) : y
@@ -16459,8 +17136,8 @@ var zoom = function() {
     });
   };
 
-  zoom.translateTo = function(selection, x, y) {
-    zoom.transform(selection, function() {
+  zoom.translateTo = function(selection$$1, x, y) {
+    zoom.transform(selection$$1, function() {
       var e = extent.apply(this, arguments),
           t = this.__zoom,
           p = centroid(e);
@@ -16471,22 +17148,22 @@ var zoom = function() {
     });
   };
 
-  function scale(transform$$1, k) {
+  function scale(transform, k) {
     k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], k));
-    return k === transform$$1.k ? transform$$1 : new Transform(k, transform$$1.x, transform$$1.y);
+    return k === transform.k ? transform : new Transform(k, transform.x, transform.y);
   }
 
-  function translate(transform$$1, p0, p1) {
-    var x = p0[0] - p1[0] * transform$$1.k, y = p0[1] - p1[1] * transform$$1.k;
-    return x === transform$$1.x && y === transform$$1.y ? transform$$1 : new Transform(transform$$1.k, x, y);
+  function translate(transform, p0, p1) {
+    var x = p0[0] - p1[0] * transform.k, y = p0[1] - p1[1] * transform.k;
+    return x === transform.x && y === transform.y ? transform : new Transform(transform.k, x, y);
   }
 
   function centroid(extent) {
     return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
   }
 
-  function schedule(transition, transform$$1, center) {
-    transition
+  function schedule(transition$$1, transform, center) {
+    transition$$1
         .on("start.zoom", function() { gesture(this, arguments).start(); })
         .on("interrupt.zoom end.zoom", function() { gesture(this, arguments).end(); })
         .tween("zoom", function() {
@@ -16497,7 +17174,7 @@ var zoom = function() {
               p = center || centroid(e),
               w = Math.max(e[1][0] - e[0][0], e[1][1] - e[0][1]),
               a = that.__zoom,
-              b = typeof transform$$1 === "function" ? transform$$1.apply(that, args) : transform$$1,
+              b = typeof transform === "function" ? transform.apply(that, args) : transform,
               i = interpolate(a.invert(p).concat(w / a.k), b.invert(p).concat(w / b.k));
           return function(t) {
             if (t === 1) t = b; // Avoid rounding error on end.
@@ -16532,11 +17209,11 @@ var zoom = function() {
       }
       return this;
     },
-    zoom: function(key, transform$$1) {
-      if (this.mouse && key !== "mouse") this.mouse[1] = transform$$1.invert(this.mouse[0]);
-      if (this.touch0 && key !== "touch") this.touch0[1] = transform$$1.invert(this.touch0[0]);
-      if (this.touch1 && key !== "touch") this.touch1[1] = transform$$1.invert(this.touch1[0]);
-      this.that.__zoom = transform$$1;
+    zoom: function(key, transform) {
+      if (this.mouse && key !== "mouse") this.mouse[1] = transform.invert(this.mouse[0]);
+      if (this.touch0 && key !== "touch") this.touch0[1] = transform.invert(this.touch0[0]);
+      if (this.touch1 && key !== "touch") this.touch1[1] = transform.invert(this.touch1[0]);
+      this.that.__zoom = transform;
       this.emit("zoom");
       return this;
     },
@@ -16636,13 +17313,13 @@ var zoom = function() {
   function touchstarted() {
     if (!filter.apply(this, arguments)) return;
     var g = gesture(this, arguments),
-        touches = exports.event.changedTouches,
+        touches$$1 = exports.event.changedTouches,
         started,
-        n = touches.length, i, t, p;
+        n = touches$$1.length, i, t, p;
 
     nopropagation$2();
     for (i = 0; i < n; ++i) {
-      t = touches[i], p = touch(this, touches, t.identifier);
+      t = touches$$1[i], p = touch(this, touches$$1, t.identifier);
       p = [p, this.__zoom.invert(p), t.identifier];
       if (!g.touch0) g.touch0 = p, started = true;
       else if (!g.touch1) g.touch1 = p;
@@ -16668,13 +17345,13 @@ var zoom = function() {
 
   function touchmoved() {
     var g = gesture(this, arguments),
-        touches = exports.event.changedTouches,
-        n = touches.length, i, t, p, l;
+        touches$$1 = exports.event.changedTouches,
+        n = touches$$1.length, i, t, p, l;
 
     noevent$2();
     if (touchstarting) touchstarting = clearTimeout(touchstarting);
     for (i = 0; i < n; ++i) {
-      t = touches[i], p = touch(this, touches, t.identifier);
+      t = touches$$1[i], p = touch(this, touches$$1, t.identifier);
       if (g.touch0 && g.touch0[2] === t.identifier) g.touch0[0] = p;
       else if (g.touch1 && g.touch1[2] === t.identifier) g.touch1[0] = p;
     }
@@ -16695,14 +17372,14 @@ var zoom = function() {
 
   function touchended() {
     var g = gesture(this, arguments),
-        touches = exports.event.changedTouches,
-        n = touches.length, i, t;
+        touches$$1 = exports.event.changedTouches,
+        n = touches$$1.length, i, t;
 
     nopropagation$2();
     if (touchending) clearTimeout(touchending);
     touchending = setTimeout(function() { touchending = null; }, touchDelay);
     for (i = 0; i < n; ++i) {
-      t = touches[i];
+      t = touches$$1[i];
       if (g.touch0 && g.touch0[2] === t.identifier) delete g.touch0;
       else if (g.touch1 && g.touch1[2] === t.identifier) delete g.touch1;
     }
@@ -16712,19 +17389,19 @@ var zoom = function() {
   }
 
   zoom.wheelDelta = function(_) {
-    return arguments.length ? (wheelDelta = typeof _ === "function" ? _ : constant$12(+_), zoom) : wheelDelta;
+    return arguments.length ? (wheelDelta = typeof _ === "function" ? _ : constant$d(+_), zoom) : wheelDelta;
   };
 
   zoom.filter = function(_) {
-    return arguments.length ? (filter = typeof _ === "function" ? _ : constant$12(!!_), zoom) : filter;
+    return arguments.length ? (filter = typeof _ === "function" ? _ : constant$d(!!_), zoom) : filter;
   };
 
   zoom.touchable = function(_) {
-    return arguments.length ? (touchable = typeof _ === "function" ? _ : constant$12(!!_), zoom) : touchable;
+    return arguments.length ? (touchable = typeof _ === "function" ? _ : constant$d(!!_), zoom) : touchable;
   };
 
   zoom.extent = function(_) {
-    return arguments.length ? (extent = typeof _ === "function" ? _ : constant$12([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
+    return arguments.length ? (extent = typeof _ === "function" ? _ : constant$d([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
   };
 
   zoom.scaleExtent = function(_) {
@@ -16757,7 +17434,7 @@ var zoom = function() {
   };
 
   return zoom;
-};
+}
 
 exports.version = version;
 exports.bisect = bisectRight;
@@ -16772,7 +17449,7 @@ exports.extent = extent;
 exports.histogram = histogram;
 exports.thresholdFreedmanDiaconis = freedmanDiaconis;
 exports.thresholdScott = scott;
-exports.thresholdSturges = sturges;
+exports.thresholdSturges = thresholdSturges;
 exports.max = max;
 exports.mean = mean;
 exports.median = median;
@@ -16812,12 +17489,16 @@ exports.rgb = rgb;
 exports.hsl = hsl;
 exports.lab = lab;
 exports.hcl = hcl;
+exports.lch = lch;
+exports.gray = gray;
 exports.cubehelix = cubehelix;
+exports.contours = contours;
+exports.contourDensity = density;
 exports.dispatch = dispatch;
 exports.drag = drag;
 exports.dragDisable = dragDisable;
 exports.dragEnable = yesdrag;
-exports.dsvFormat = dsv;
+exports.dsvFormat = dsvFormat;
 exports.csvParse = csvParse;
 exports.csvParseRows = csvParseRows;
 exports.csvFormat = csvFormat;
@@ -16863,6 +17544,17 @@ exports.easeElastic = elasticOut;
 exports.easeElasticIn = elasticIn;
 exports.easeElasticOut = elasticOut;
 exports.easeElasticInOut = elasticInOut;
+exports.blob = blob;
+exports.buffer = buffer;
+exports.dsv = dsv;
+exports.csv = csv$1;
+exports.tsv = tsv$1;
+exports.image = image;
+exports.json = json;
+exports.text = text;
+exports.xml = xml;
+exports.html = html;
+exports.svg = svg;
 exports.forceCenter = center$1;
 exports.forceCollide = collide;
 exports.forceLink = link;
@@ -16877,7 +17569,7 @@ exports.formatSpecifier = formatSpecifier;
 exports.precisionFixed = precisionFixed;
 exports.precisionPrefix = precisionPrefix;
 exports.precisionRound = precisionRound;
-exports.geoArea = area;
+exports.geoArea = area$1;
 exports.geoBounds = bounds;
 exports.geoCentroid = centroid;
 exports.geoCircle = circle;
@@ -16885,7 +17577,7 @@ exports.geoClipAntimeridian = clipAntimeridian;
 exports.geoClipCircle = clipCircle;
 exports.geoClipExtent = extent$1;
 exports.geoClipRectangle = clipRectangle;
-exports.geoContains = contains;
+exports.geoContains = contains$1;
 exports.geoDistance = distance;
 exports.geoGraticule = graticule;
 exports.geoGraticule10 = graticule10;
@@ -16904,6 +17596,8 @@ exports.geoConicEqualArea = conicEqualArea;
 exports.geoConicEqualAreaRaw = conicEqualAreaRaw;
 exports.geoConicEquidistant = conicEquidistant;
 exports.geoConicEquidistantRaw = conicEquidistantRaw;
+exports.geoEqualEarth = equalEarth;
+exports.geoEqualEarthRaw = equalEarthRaw;
 exports.geoEquirectangular = equirectangular;
 exports.geoEquirectangularRaw = equirectangularRaw;
 exports.geoGnomonic = gnomonic;
@@ -16944,7 +17638,9 @@ exports.interpolateArray = array$1;
 exports.interpolateBasis = basis$1;
 exports.interpolateBasisClosed = basisClosed;
 exports.interpolateDate = date;
-exports.interpolateNumber = reinterpolate;
+exports.interpolateDiscrete = discrete;
+exports.interpolateHue = hue$1;
+exports.interpolateNumber = interpolateNumber;
 exports.interpolateObject = object;
 exports.interpolateRound = interpolateRound;
 exports.interpolateString = interpolateString;
@@ -16961,28 +17657,21 @@ exports.interpolateHcl = hcl$2;
 exports.interpolateHclLong = hclLong;
 exports.interpolateCubehelix = cubehelix$2;
 exports.interpolateCubehelixLong = cubehelixLong;
+exports.piecewise = piecewise;
 exports.quantize = quantize;
 exports.path = path;
-exports.polygonArea = area$1;
+exports.polygonArea = area$2;
 exports.polygonCentroid = centroid$1;
 exports.polygonHull = hull;
-exports.polygonContains = contains$1;
+exports.polygonContains = contains$2;
 exports.polygonLength = length$2;
 exports.quadtree = quadtree;
-exports.queue = queue;
 exports.randomUniform = uniform;
 exports.randomNormal = normal;
 exports.randomLogNormal = logNormal;
 exports.randomBates = bates;
 exports.randomIrwinHall = irwinHall;
 exports.randomExponential = exponential$1;
-exports.request = request;
-exports.html = html;
-exports.json = json;
-exports.text = text;
-exports.xml = xml;
-exports.csv = csv$1;
-exports.tsv = tsv$1;
 exports.scaleBand = band;
 exports.scalePoint = point$1;
 exports.scaleIdentity = identity$6;
@@ -16997,21 +17686,83 @@ exports.scaleQuantize = quantize$1;
 exports.scaleThreshold = threshold$1;
 exports.scaleTime = time;
 exports.scaleUtc = utcTime;
+exports.scaleSequential = sequential;
+exports.scaleDiverging = diverging;
 exports.schemeCategory10 = category10;
-exports.schemeCategory20b = category20b;
-exports.schemeCategory20c = category20c;
-exports.schemeCategory20 = category20;
+exports.schemeAccent = Accent;
+exports.schemeDark2 = Dark2;
+exports.schemePaired = Paired;
+exports.schemePastel1 = Pastel1;
+exports.schemePastel2 = Pastel2;
+exports.schemeSet1 = Set1;
+exports.schemeSet2 = Set2;
+exports.schemeSet3 = Set3;
+exports.interpolateBrBG = BrBG;
+exports.schemeBrBG = scheme;
+exports.interpolatePRGn = PRGn;
+exports.schemePRGn = scheme$1;
+exports.interpolatePiYG = PiYG;
+exports.schemePiYG = scheme$2;
+exports.interpolatePuOr = PuOr;
+exports.schemePuOr = scheme$3;
+exports.interpolateRdBu = RdBu;
+exports.schemeRdBu = scheme$4;
+exports.interpolateRdGy = RdGy;
+exports.schemeRdGy = scheme$5;
+exports.interpolateRdYlBu = RdYlBu;
+exports.schemeRdYlBu = scheme$6;
+exports.interpolateRdYlGn = RdYlGn;
+exports.schemeRdYlGn = scheme$7;
+exports.interpolateSpectral = Spectral;
+exports.schemeSpectral = scheme$8;
+exports.interpolateBuGn = BuGn;
+exports.schemeBuGn = scheme$9;
+exports.interpolateBuPu = BuPu;
+exports.schemeBuPu = scheme$a;
+exports.interpolateGnBu = GnBu;
+exports.schemeGnBu = scheme$b;
+exports.interpolateOrRd = OrRd;
+exports.schemeOrRd = scheme$c;
+exports.interpolatePuBuGn = PuBuGn;
+exports.schemePuBuGn = scheme$d;
+exports.interpolatePuBu = PuBu;
+exports.schemePuBu = scheme$e;
+exports.interpolatePuRd = PuRd;
+exports.schemePuRd = scheme$f;
+exports.interpolateRdPu = RdPu;
+exports.schemeRdPu = scheme$g;
+exports.interpolateYlGnBu = YlGnBu;
+exports.schemeYlGnBu = scheme$h;
+exports.interpolateYlGn = YlGn;
+exports.schemeYlGn = scheme$i;
+exports.interpolateYlOrBr = YlOrBr;
+exports.schemeYlOrBr = scheme$j;
+exports.interpolateYlOrRd = YlOrRd;
+exports.schemeYlOrRd = scheme$k;
+exports.interpolateBlues = Blues;
+exports.schemeBlues = scheme$l;
+exports.interpolateGreens = Greens;
+exports.schemeGreens = scheme$m;
+exports.interpolateGreys = Greys;
+exports.schemeGreys = scheme$n;
+exports.interpolatePurples = Purples;
+exports.schemePurples = scheme$o;
+exports.interpolateReds = Reds;
+exports.schemeReds = scheme$p;
+exports.interpolateOranges = Oranges;
+exports.schemeOranges = scheme$q;
 exports.interpolateCubehelixDefault = cubehelix$3;
-exports.interpolateRainbow = rainbow$1;
+exports.interpolateRainbow = rainbow;
 exports.interpolateWarm = warm;
 exports.interpolateCool = cool;
+exports.interpolateSinebow = sinebow;
 exports.interpolateViridis = viridis;
 exports.interpolateMagma = magma;
 exports.interpolateInferno = inferno;
 exports.interpolatePlasma = plasma;
-exports.scaleSequential = sequential;
+exports.create = create;
 exports.creator = creator;
-exports.local = local$1;
+exports.local = local;
 exports.matcher = matcher$1;
 exports.mouse = mouse;
 exports.namespace = namespace;
@@ -17028,7 +17779,7 @@ exports.touches = touches;
 exports.window = defaultView;
 exports.customEvent = customEvent;
 exports.arc = arc;
-exports.area = area$2;
+exports.area = area$3;
 exports.line = line;
 exports.pie = pie;
 exports.areaRadial = areaRadial;
@@ -17068,11 +17819,11 @@ exports.curveStepAfter = stepAfter;
 exports.curveStepBefore = stepBefore;
 exports.stack = stack;
 exports.stackOffsetExpand = expand;
-exports.stackOffsetDiverging = diverging;
+exports.stackOffsetDiverging = diverging$1;
 exports.stackOffsetNone = none$1;
 exports.stackOffsetSilhouette = silhouette;
 exports.stackOffsetWiggle = wiggle;
-exports.stackOrderAscending = ascending$2;
+exports.stackOrderAscending = ascending$3;
 exports.stackOrderDescending = descending$2;
 exports.stackOrderInsideOut = insideOut;
 exports.stackOrderNone = none$2;