This example displays a world map rendered with D3’s `geoNaturalEarth1` projection and `geoPath`, drawing the sphere background and country boundaries. It loads world atlas TopoJSON data from the `world-atlas` package, converts it to GeoJSON with `topojson`’s `feature` function, and maps each country to an SVG path with a black fill and red stroke. The map is generated entirely client-side as SVG, using D3 v5.