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china-pop-density.html
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china-pop-density.html
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<!DOCTYPE html>
<meta charset="utf-8">
<title>中国省份人口密度（人/km2）</title>
<link href="./china.css" media="screen, projection" rel="stylesheet" type="text/css">
<link href="/stylesheets/skeleton.css" media="screen, projection" rel="stylesheet" type="text/css">
<style type="text/css">
.legend {
position: absolute;
bottom: 50px;
text-align: center;
}
.legend p {
position: static;
margin-bottom: 5px;
}
.legend .color-bar {
position: static;
}
.color-bar {
display: inline-block;
width: 20px;
height: 200px;
background: linear-gradient(to top, #ffffcc 0%, #800026 100%);
}
.container {
position: relative;
}
</style>
<body>
<div class="container">
<div class="ten columns">
<div id="tooltip"></div><!-- div to hold tooltip. -->
<svg id="chinaProvinces"></svg> <!-- svg to hold the map. -->
</div>
<div class="two columns">
<dl>中国省份人口密度</dl>
<dl>（人/km2）2013</dl>
<div class="legend">
<p>19,044.82 人/km2</p>
<div class="color-bar"></div>
<p>2.44 人/km2</p>
</div>
</div>
</div>
<script type="text/javascript" src="/javascripts/d3.min.js"></script>
<script src="./china.js"></script> <!-- creates uStates. -->
<script>
function tooltipHtml(d){ /* function to create html content string in tooltip div. */
return "<h4>"+d.name+"</h4>" + "<span>" + d.dense +" 人/km2</span>";
}
d3.csv("china.csv", function (e, rows) {
var sampleData = {};
var m = d3.max(rows, function (d) { return +d.dense; });
rows.forEach(function (d) {
sampleData[d.id] = {
dense: d.dense,
color: d3.interpolate("#ffffcc", "#800026")(Math.pow(+d.dense / m, 0.35))
};
});
/* draw provinces on id #chinaProvinces */
var ch = china();
ch.scale(0.8)
.height(600)
.width(800)
.tooltipHtml(tooltipHtml)
.draw("#chinaProvinces", sampleData);
});
</script>
How it is done using <a href="https://github.com/francis-liberty/china.js">china.js</a> :
<script src="https://gist.github.com/francis-liberty/61f4b4327b3a24172b27.js"></script>
</body>