Visualization toolmaker. Founder @observablehq. Creator @d3. Former @nytgraphics. Pronounced BOSS-tock.
Published
Edited
Dec 24, 2019
5 forks
10 stars
map = {
const svg = d3.select(DOM.svg(width, height));
svg.append("path")
.attr("fill", "none")
.attr("stroke", "#ccc")
.attr("d", path(graticule));
svg.append("g")
.selectAll("path")
.data(countries)
.join("path")
.attr("fill", (d, i) => d3.schemeCategory10[index[i] % 10])
.attr("d", path);
svg.append("path")
.attr("fill", "none")
.attr("stroke", "black")
.attr("stroke-width", 1.5)
.attr("d", path(sphere));
return svg.node();
}
index = {
const index = new Int32Array(countries.length);
for (let i = 0; i < index.length; ++i) {
index[i] = d3.max(neighbors[i], j => index[j]) + 1 | 0;
}
return index;
}
projection = d3.geoMollweide()
path = d3.geoPath(projection)
height = {
const [[x0, y0], [x1, y1]] = d3.geoPath(projection.fitWidth(width, sphere)).bounds(sphere);
const dy = Math.ceil(y1 - y0), l = Math.min(Math.ceil(x1 - x0), dy);
projection.scale(projection.scale() * (l - 1) / l).precision(0.2);
return dy;
}
sphere = ({type: "Sphere"})
graticule = d3.geoGraticule10()
neighbors = topojson.neighbors(world.objects.countries.geometries)
countries = topojson.feature(world, world.objects.countries).features
world = FileAttachment("countries-50m.json").json()
topojson = require("topojson-client@3")
d3 = require("d3@5", "d3-geo-projection@2")
One platform to build and deploy the best data apps
Experiment and prototype by building visualizations in live JavaScript notebooks. Collaborate with your team and decide which concepts to build out.
Use Observable Framework to build data apps locally. Use data loaders to build in any language or library, including Python, SQL, and R.
Seamlessly deploy to Observable. Test before you ship, use automatic deploy-on-commit, and ensure your projects are always up-to-date.