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Last active June 28, 2016 03:01
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WWSD #2-a: Leaflet Choropleth
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README.md
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index.html
<!DOCTYPE html>
<head>
<meta charset="utf-8">
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
<link rel="stylesheet" href="http://cdn.leafletjs.com/leaflet/v0.7.7/leaflet.css" />
<script src="http://cdn.leafletjs.com/leaflet/v0.7.7/leaflet.js"></script>
<style>
body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
#map {
height: 100%;
}
</style>
</head>
<body>
<div id="map"></div>
<script>
var map = L.map('map').setView([52, 0], 3);
L.tileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png', {
attribution: '&copy; <a href="http://osm.org/copyright">OpenStreetMap</a> contributors'
}).addTo(map);
var color = d3.scale.threshold()
.domain([0, 1000000, 100000000, 1000000000])
.range(["#ffffcc","#c2e699","#78c679","#31a354","#006837"]);
var color2 = d3.scale.linear()
.range(["#ffffcc", "#006837"])
var url = "http://enjalot.github.io/wwsd/data/world/ne_50m_admin_0_countries.geojson"
d3.json(url, function(err, data) {
var maxPop = d3.max(data.features, function(d) {
return d.properties.pop_est
})
color2.domain([0, maxPop])
L.geoJson(data, {
style: function(feature) {
return {
fillColor: color2(feature.properties.pop_est),
fillOpacity:0.9,
weight: 1,
}
}
}).addTo(map)
})
</script>
</body>
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