This example presents a world map in an equirectangular-style view using the Natural Earth projection, with countries rendered as light green shapes against a blue ocean sphere. The visualization loads GeoJSON country boundaries from the world-atlas TopoJSON dataset via `d3.json` and converts them using TopoJSON’s `feature` method. It uses `d3.geoNaturalEarth1` for projection and `d3.geoPath` to generate SVG paths, with the sphere background and country outlines styled through CSS classes.