It leaves all the original shapefile metadata attached, meaning the resulting files are not optimised for web-use but are much easier to use, particularly in non-production settings.

Usage

In a browser (using d3-geo and Canvas), bl.ocks.org/3783604:

<!DOCTYPE html>
<canvas width="960" height="500"></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(d3.geoOrthographic(), context);

d3.json("https://unpkg.com/world-atlas@1/world/110m.json", function(error, world) {
  if (error) throw error;

  context.beginPath();
  path(topojson.mesh(world));
  context.stroke();
});

</script>

In Node (using d3-geo and node-canvas), bl.ocks.org/885fffe88d72b2a25c090e0bbbef382f:

var fs = require("fs"),
    d3 = require("d3-geo"),
    topojson = require("topojson-client"),
    Canvas = require("canvas"),
    world = require("./node_modules/world-atlas/world/110m.json");

var canvas = new Canvas(960, 500),
    context = canvas.getContext("2d"),
    path = d3.geoPath(d3.geoOrthographic(), context);

context.beginPath();
path(topojson.mesh(world));
context.stroke();

canvas.pngStream().pipe(fs.createWriteStream("preview.png"));

File Reference

# world/110m.json <>

A TopoJSON topology containing two geometry collections: countries and land. The geometry is quantized, but not projected; it is in spherical coordinates, decimal degrees. This topology is derived from the Natural Earth’s Admin 0 country boundaries, 1:110m small scale, version 2.0.0. The land boundary is computed by merging countries, ensuring a consistent topology.

# world.objects.countries

# world.objects.land

# world/50m.json <>

Equivalent to world/110m.json, but at 1:50m medium scale.

# world.objects.countries

# world.objects.land

Sources

Germany

Keywords

topojson

geojson

shapefile

FAQs

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Package last updated on 15 Sep 2017

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