The avatar for @larsvers
lars
Published
Maps
Edited
Sep 1, 2018
1 fork
102 stars
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hexbin = d3.hexbin()
.extent([[0,0],[w, h]])
.radius(r)
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imageData = image.getContext('2d').getImageData(0, 0, w, h).data
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imageDataAlpha = imageData.filter((d,i) => i%4 === 3)
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imageCenters = {
return centers.filter(d => imageDataAlpha[Math.floor(d[0]) + Math.floor(d[1]) * w]);
}
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projection = d3.geoAlbers().fitSize([w, h], us)
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path = d3.geoPath().projection(projection)
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hexgrid = d3.hexgrid()
.extent([w, h])
.geography(us)
.projection(projection)
.pathGenerator(path)
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hex = hexgrid(markets)
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marketColours = d3.scaleSequential(t => {
var tNew = Math.pow(t, power);
return d3.interpolateViridis(tNew);
}).domain([...hex.grid.extentPointDensity].reverse())
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// html `<style>canvas { border: 1px solid #ccc}</style>`
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