This example displays a world map rendered in SVG, with countries filled in maroon and outlined in green against a skyblue sphere. Hovering over a country changes its fill to brown. It uses D3 v5’s `geoEquirectangular` projection and `geoPath` to draw the map, with geographic data loaded as TopoJSON from the world-atlas dataset. The page also leverages `topojson.feature` to convert the TopoJSON into GeoJSON for rendering.