This example displays a polished world map with natural Earth projection, rendering landmasses in teal, graticules, and country borders. It loads country boundaries from World Atlas TopoJSON and uses `geoNaturalEarth1`, `geoPath`, and `geoGraticule` from d3. The map is built with React and d3.v5, rendering SVG paths for spheres, graticules, land features, and interior mesh lines, styled through CSS classes.