This example displays a world map using a natural Earth projection, with each country rendered as a white SVG path with black outlines. The visualization loads geographic data from a GitHub-hosted TopoJSON file, then uses `d3.geoPath` and `geoNaturalEarth1` to project the features onto a 960x500 canvas. The code also draws a transparent sphere outline around the map. D3 v5’s `json` and `select` methods handle the asynchronous data loading and SVG element creation, while TopoJSON’s `feature` API converts the encoded boundaries into usable GeoJSON geometries.