Created
May 25, 2014 23:51
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Show Yokohama city map.
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<!DOCTYPE html> | |
<html lang="ja"> | |
<head> | |
<meta charset="utf-8"> | |
<script src="http://d3js.org/d3.v3.min.js"></script> | |
<script src="http://d3js.org/topojson.v0.min.js"></script> | |
<style type="text/css"> | |
h1 { | |
font-size: 16px; | |
} | |
svg { | |
border: 1px solid #aaaaaa; | |
} | |
.subunit-boundary { | |
fill: none; | |
stroke: #777; | |
stroke-dasharray: 2,2; | |
stroke-linejoin: round; | |
} | |
</style> | |
<title>Yokohama city map</title> | |
</head> | |
<body> | |
<h1>Yokohama city map</h1> | |
<div id="map"></div> | |
<script type="text/javascript"> | |
var map_width = 500; | |
var map_height = 650; | |
var svg; | |
d3.json("yokohama_topo.json", function(error, json) { | |
if( !error ) { | |
main(json); | |
} | |
return; | |
}); | |
function main(topo) { | |
var labelLineHight = 16; | |
// svgを追加 | |
svg = d3.select("body #map").append("svg") | |
.attr("width", map_width) | |
.attr("height", map_height); | |
// 横浜市のmapを描画する | |
var yokohama = topojson.object(topo, topo.objects.yokohama); | |
console.log(yokohama); | |
// 横浜市を中心に指定したメルカトル図法で10万分の1で描画する | |
var projection = d3.geo.mercator() | |
.center([139.59,35.45]) | |
.scale(100000) | |
.translate([map_width / 2, map_height / 2]); | |
// pathを作成する | |
var path = d3.geo.path().projection(projection); | |
svg.append("path") | |
.datum(yokohama) | |
.attr("d", path); | |
// 色を塗る | |
svg.selectAll("path").attr("fill", "#bee59e"); | |
// 内部境界に線を引く | |
svg.append("path") | |
.datum(topojson.mesh(topo, topo.objects.yokohama, function(a, b) { return a !== b; })) | |
.attr("d", path) | |
.attr("class", "subunit-boundary"); | |
} | |
</script> | |
</body> | |
</html> |
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