This example displays a world map with country boundaries and graticules, rendered as SVG using React and D3 v5. It shows the full sphere and landmasses colored in teal, with interior country borders and graticule lines in lighter strokes. The visualization loads World Atlas TopoJSON data from unpkg, converting it to GeoJSON features and a mesh with the topojson library. The map uses d3.geoNaturalEarth1 for projection and d3.geoPath to draw the sphere, land, and border paths.