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geoVoronoi polygons()

Skeletal demo for d3.geoVoronoi

by Philippe Rivière.

<!DOCTYPE html>
<meta charset="utf-8">
<style>
    #sphere {
        stroke: #444;
        stroke-width: 2;
    }
    .polygons {
        stroke: #444;
    }
    
    .sites {
        stroke: black;
        fill: white;
    }
    
</style>

<svg width="960" height="600"></svg>

<script src="https://d3js.org/d3.v5.min.js"></script>
<script src="https://unpkg.com/d3-delaunay@5"></script>
<script src="https://unpkg.com/d3-geo-voronoi@1.5"></script>

<script>
var points = {
    type: "FeatureCollection",
    features: d3.range(100).map(function() {
        return {
            type: "Point",
            coordinates: [ 360 * Math.random(), 90 * (Math.random() - Math.random()) ]
        }
    })
}
var v = d3.geoVoronoi()(points);
var projection = d3.geoOrthographic(),
    path = d3.geoPath().projection(projection);
var svg = d3.select("svg");
svg.append('path')
    .attr('id', 'sphere')
    .datum({ type: "Sphere" })
    .attr('d', path);
svg.append('g')
    .attr('class', 'polygons')
    .selectAll('path')
    .data(v.polygons().features)
    .enter()
    .append('path')
    .attr('d', path)
    .attr('fill', function(_,i) { return d3.schemeCategory10[i%10]; });
svg.append('g')
    .attr('class', 'sites')
    .selectAll('path')
    .data(points.features)
    .enter()
    .append('path')
    .attr('d', path);
// gentle animation
d3.interval(function(elapsed) {
    projection.rotate([ elapsed / 150, 0 ]);
    svg.selectAll('path')
        .attr('d', path);
}, 50);
</script>

https://d3js.org/d3.v5.min.js

https://unpkg.com/d3-delaunay@5

https://unpkg.com/d3-geo-voronoi@1.5