This world map visualizes global landmasses and country interiors using a Natural Earth projection. It draws the sphere, graticules, and land polygons as SVG paths via `d3.geoPath` and the `geoNaturalEarth1` projection. The map loads country boundaries from a world-atlas TopoJSON file, processed with `topojson.feature` and `topojson.mesh`. Land is filled in a teal color, while interior boundaries are stroked distinctly over a light gray sphere and grid.