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World population - Dorling
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license: gpl-3.0 | |
height: 500 | |
border: no |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
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<!DOCTYPE html> | |
<meta charset="utf-8"> | |
<script src="//d3js.org/d3.v4.min.js"></script> | |
<script src="//d3js.org/d3-geo-projection.v1.min.js"></script> | |
<script src="//d3js.org/topojson.v2.min.js"></script> | |
<style> | |
.land { | |
fill: #323436; | |
stroke: none; | |
opacity: 0.5; | |
} | |
.border { | |
fill: none; | |
stroke: #727476; | |
stroke-width: .5px; | |
stroke-linejoin: round; | |
stroke-linecap: round; | |
} | |
.graticule { | |
fill: none; | |
stroke: #323436; | |
stroke-width: .5px; | |
} | |
.stroke { | |
fill: none; | |
stroke: #121416; | |
stroke-width: .5px; | |
} | |
.fill { | |
fill: #121416; | |
} | |
.bubble { | |
stroke: none; | |
stroke-width: .5px; | |
} | |
.q0-9 { fill:rgba(255,247,243, 0.1); } | |
.q1-9 { fill:rgba(253,224,221, 0.2); } | |
.q2-9 { fill:rgba(252,197,192, 0.3); } | |
.q3-9 { fill:rgba(250,159,181, 0.35); } | |
.q4-9 { fill:rgba(247,104,161, 0.4); } | |
.q5-9 { fill:rgba(221,52,151, 0.45); } | |
.q6-9 { fill:rgba(174,1,126, 0.5); } | |
.q7-9 { fill:rgba(122,1,119, 0.55); } | |
.q8-9 { fill:rgba(73,0,106, 0.6); } | |
</style> | |
<body> | |
<script> | |
var width = 960, | |
height = 500; | |
var radius = d3.scaleSqrt() | |
.domain([0, 1.45e9]) | |
.range([0, 32]); | |
var proj = d3.geoCylindricalStereographic() | |
.parallel(35) // DIN A4 | |
.precision(.1); | |
var path = d3.geoPath() | |
.projection (proj); | |
var quantile = d3.scaleQuantile() | |
.range(d3.range(9).map(function(i) { return "q" + i + "-9"; })); | |
var dichteById = d3.map(); | |
// start map | |
var svg = d3.select("body").append("svg") | |
.attr("width", width) | |
.attr("height", height); | |
var defs = svg.append("defs"); | |
defs.append("path") | |
.datum({type: "Sphere"}) | |
.attr("id", "sphere") | |
.attr("d", path) | |
defs.append("clipPath") | |
.attr("id", "clip") | |
.append("use") | |
.attr("xlink:href", "#sphere"); | |
svg.append("use") | |
.attr("class", "stroke") | |
.attr("xlink:href", "#sphere"); | |
svg.append("use") | |
.attr("class", "fill") | |
.attr("xlink:href", "#sphere"); | |
var features = svg.append("g") | |
.attr("class", "land"); | |
var bubbles = svg.append("g"); | |
function renderWorld(world) { | |
// Graticule | |
features.append("path") | |
.datum(d3.geoGraticule()) | |
.attr("class", "graticule") | |
.attr("clip-path", "url(#clip)") | |
.attr("d", path); | |
// world land | |
features.selectAll("countries") | |
.data(topojson.feature(world, world.objects.countries).features) | |
.enter().append("path") | |
.attr("clip-path", "url(#clip)") | |
.attr("d", path); | |
// country borders | |
features.append("path") | |
.datum(topojson.mesh(world, world.objects.countries, function(a, b) { return a !== b; })) | |
.attr("class", "border") | |
.attr("clip-path", "url(#clip)") | |
.attr("d", path); | |
} | |
function renderBubbles(nodes) { | |
var node = bubbles.selectAll("circle") | |
.data(nodes) | |
.enter().append("circle") | |
.attr("class", function(d) { return quantile(dichteById.get(d.n)); }) | |
.attr("r", function(d) {return d.r;} ); | |
node.append("title").text(function(d) {return d.n;}); | |
var simulation = d3.forceSimulation(nodes) | |
.velocityDecay(0.8) | |
.force("x", d3.forceX().x(function(d) { return d.x; })) | |
.force("y", d3.forceY().y(function(d) { return d.y; })) | |
.force("collide", d3.forceCollide().radius(function(d) { return d.r }).strength(0.5)) | |
.on("tick", function() { | |
node | |
.attr("cx", function(d) { return d.x; }) | |
.attr("cy", function(d) { return d.y; }) | |
}); | |
} | |
d3.json("50m.json", function (error, world) { | |
if (error) throw error; | |
renderWorld(world); | |
}); | |
d3.json("points.geojson", function (error, points) { | |
if (error) throw error; | |
// set domain for quantiles based on data | |
for (var i = 0; i < points.features.length; ++i) { | |
dichteById.set(points.features[i].properties.name, +points.features[i].properties.dichte); | |
} | |
quantile.domain(dichteById.values()); | |
// create a set of nodes for dorling cartogram | |
var nodes = points.features.map(function(d) { | |
var point = proj(d.geometry.coordinates); | |
return { | |
x: point[0], y: point[1], | |
//x0: point[0], y0: point[1], | |
r: radius(d.properties.pop_est), | |
n: d.properties.name | |
} | |
}); | |
// render cartogram | |
renderBubbles(nodes); | |
}); | |
</script> |
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