This example displays a world map using an equirectangular projection, rendering each country as a green SVG path with black outlines that turn orange on hover. The visualization loads geographic data from the world-atlas TopoJSON file and converts it to GeoJSON using the `feature` method from TopoJSON. D3 v5’s `geoPath` and `geoEquirectangular` generate the sphere background and country shapes, while CSS handles the color styling and interactive hover states.