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mbostock/.block

Last active February 1, 2020 08:27
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d3.geoPath + node-canvas
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.block
license: GPL-3.0
height: 600
border: no
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README.md
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index.html
<!DOCTYPE html>
<img src="preview.png" width="960" height="600">
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package.json
{
"name": "d3-geoPath-canvas-example",
"version": "0.0.1",
"license": "GPL-3.0",
"scripts": {
"prepublish": "./rasterize"
},
"devDependencies": {
"canvas": "1",
"d3-geo": "1",
"topojson-client": "2",
"us-atlas": "1"
}
}
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rasterize
#!/usr/bin/env node
var fs = require("fs"),
d3 = require("d3-geo"),
topojson = require("topojson-client"),
Canvas = require("canvas"),
us = require("./node_modules/us-atlas/us/10m.json");
var canvas = new Canvas(960, 600),
context = canvas.getContext("2d"),
path = d3.geoPath().context(context);
context.beginPath();
path(topojson.mesh(us));
context.stroke();
canvas.pngStream().pipe(fs.createWriteStream("preview.png"));
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