Skip to content

Instantly share code, notes, and snippets.

@mbostock

mbostock/.block

Last active January 23, 2020 07:32
Show Gist options
  • Save mbostock/3783604 to your computer and use it in GitHub Desktop.
Save mbostock/3783604 to your computer and use it in GitHub Desktop.
Download ZIP
d3.geoPath + Canvas
Raw
.block
license: gpl-3.0
height: 600
border: no
redirect: https://observablehq.com/@d3/u-s-map-canvas
Raw
README.md
Raw
index.html
<!DOCTYPE html>
<canvas width="960" height="600"></canvas>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script src="https://unpkg.com/topojson-client@3"></script>
<script>
var context = d3.select("canvas").node().getContext("2d"),
path = d3.geoPath().context(context);
d3.json("https://unpkg.com/us-atlas@1/us/10m.json", function(error, us) {
if (error) throw error;
context.beginPath();
path(topojson.mesh(us));
context.stroke();
});
</script>
@wangjiaji
Copy link

It should be noted that beginPath() should be called manually if you want to redraw after panning or zooming.

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment