This example renders an interactive world map using a Natural Earth projection. It displays country boundaries with graticule lines and an outline, all drawn as SVG paths. The visualization loads geographic data from a remote TopoJSON file and converts it to GeoJSON using `topojson.feature`. The map is rendered with D3’s `geoNaturalEarth1` projection, `geoPath`, and `geoGraticule`, with a React state management pattern handling asynchronous data fetching.