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December 24, 2015 11:58
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Australia polling booth voronoi and ocean overlay
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<!DOCTYPE html> | |
<meta charset="utf-8"> | |
<style> | |
path { | |
stroke-linejoin: round; | |
fill: none; | |
} | |
.topojson { | |
stroke: #222; | |
} | |
.voronoi { | |
stroke: none; | |
} | |
.geojson { | |
stroke: red; | |
} | |
.ocean { | |
fill: steelblue; | |
} | |
</style> | |
<body> | |
<script src="http://d3js.org/d3.v3.min.js"></script> | |
<script src="http://d3js.org/queue.v1.min.js"></script> | |
<script src="http://d3js.org/topojson.v1.min.js"></script> | |
<script> | |
var width = 960, | |
height = 600; | |
var ausCenter = [144.9, -37.8]; | |
var parallels = [-36, -18]; | |
var projection = d3.geo.albers() | |
.translate([width / 2, height / 2]) | |
.scale(20000) | |
.rotate([-ausCenter[0], 0]) | |
.center([0, ausCenter[1]]) | |
.parallels(parallels) | |
.clipExtent([[0, 0], [width, height]]) | |
.precision(0); | |
var path = d3.geo.path() | |
.projection(projection); | |
var svg = d3.select("body").append("svg") | |
.attr("width", width) | |
.attr("height", height); | |
var zoom = d3.behavior.zoom() | |
.translate(projection.translate()) | |
.scale(projection.scale()) | |
.on("zoom", zoomed); | |
svg.call(zoom); | |
queue() | |
.defer(d3.json, "voronoi.json") | |
.defer(d3.json, "ocean.json") | |
.await(ready); | |
function ready(err, geo, ocean) { | |
window.geo = geo; | |
console.log(geo); | |
svg.selectAll("path.geojson") | |
.data(topojson.feature(geo, geo.objects.voronoi).features) | |
.enter().append("path") | |
.attr("class", "geojson") | |
.attr("d", path); | |
svg.append("path") | |
.datum(topojson.feature(ocean, ocean.objects.ocean)) | |
.attr("class", "ocean") | |
.attr("d", path); | |
console.log(ocean); | |
} | |
function zoomed() { | |
projection | |
.translate(d3.event.translate) | |
.scale(d3.event.scale); | |
svg.selectAll("path").attr("d", path); | |
} | |
</script> | |
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