This map displays country boundaries from the World Atlas TopoJSON source overlaid with graticules and sphere outlines. It is rendered as SVG with React, using d3.geoNaturalEarth1 for projection, d3.geoPath for path generation, and d3.geoGraticule for the graticule layer. The land polygons are filled teal, interiors drawn in a contrasting stroke, and the graticules in light gray. Data is fetched via d3.json from unpkg and processed with topojson’s feature and mesh functions.