This example shows a basic world map rendered with Natural Earth projection, displaying country boundaries as white-outlined paths and a graticule grid in light gray. The visualization uses `d3.geoNaturalEarth1` and `d3.geoPath` to project geographic data, with `d3.geoGraticule` generating latitude/longitude lines. Country features are extracted from a TopoJSON world atlas using `topojson-client`, fetched asynchronously from an unpkg-hosted dataset. The map updates when the data arrives, with the SVG canvas resizing to the full viewport.