This example displays a world map from the world-atlas TopoJSON dataset, rendered as styled SVG paths for each country, with an underlying blue sphere as background. It uses d3.geoEquirectangular for projection and d3.geoPath to generate paths from GeoJSON features extracted with topojson.feature. Hover effects change country fill colors via CSS, while the React framework integrates the D3 code within a margin-aware container component.