This example displays a polished world map with country boundaries, graticules, and a sphere outline, rendered as an SVG using React. It fetches TopoJSON data from the World Atlas and converts it to GeoJSON with `topojson.feature` and `topojson.mesh`. The visualization uses `d3.geoNaturalEarth1` for projection and `d3.geoPath` to draw paths, with custom styling for land, interiors, and graticules in CSS.