map = {
const width = 928;
const height = width;
const context = DOM.context2d(width, height);
const projection = d3.geoStereographic()
.rotate([95, 45])
.translate([width / 2, height / 2])
.scale(width / 10.1)
.center([30, -5])
.clipAngle(166);
const path = d3.geoPath(projection, context);
const land = topojson.feature(world, world.objects.land);
context.lineJoin = "round";
context.lineCap = "round";
context.fillStyle = "#fff";
context.fillRect(0, 0, width, height);
context.beginPath();
path({type: "Sphere"});
path(land);
context.lineWidth = 0.5;
context.stroke();
context.clip("evenodd");
context.save();
context.beginPath();
path(land);
context.filter = "blur(12px)";
context.fillStyle = "#aaa";
context.fill("evenodd");
context.restore();
context.beginPath();
path(d3.geoGraticule10());
context.globalAlpha = 0.2;
context.strokeStyle = "#000";
context.stroke();
return context.canvas;
}
world = FileAttachment("land-50m.json").json()
d3 = require("d3-geo@1")
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.
