This example displays a world map with country boundaries and graticules, styled with teal land masses and a light gray sphere. The visualization uses React and D3 v5, loading geographic data from the world-atlas TopoJSON file and converting it into GeoJSON with topojson’s `feature` and `mesh` functions. It renders as SVG, using `d3.geoNaturalEarth1` for projection and `d3.geoPath` to draw the sphere, graticules, land features, and interior borders, which are styled via CSS classes.