map = htl.html`<svg viewBox="0 0 ${width} ${height}" style="display: block;">
<path d="${path(d3.geoGraticule10())}" stroke="#ccc" fill="none"></path>
<path d="${path(land)}" stroke="gray"></path>
<path d="${path(outline)}" fill="none" stroke="#000"></path>
</svg>`
projection = d3.geoEqualEarth()
path = d3.geoPath(projection)
height = {
const [[x0, y0], [x1, y1]] = d3.geoPath(projection.fitWidth(width, outline)).bounds(outline);
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;
}
outline = ({type: "Sphere"})
land = topojson.feature(world, world.objects.countries)
world = FileAttachment("countries-50m.json").json()
topojson = require("topojson-client@3")
d3 = require("d3-geo@2", "d3-geo-projection@3")
Purpose-built for displays of data
Observable is your go-to platform for exploring data and creating expressive data visualizations. Use reactive JavaScript notebooks for prototyping and a collaborative canvas for visual data exploration and dashboard creation.
