This example displays a basic world map using the Natural Earth projection, with country boundaries rendered as filled paths and graticule lines overlaid. It loads GeoJSON data from the Visionscarto World Atlas via `topojson-client` and renders the map using `d3.geoPath` with the `geoNaturalEarth1` projection. The visualization is built with React and D3, featuring an SVG canvas that adapts to the window size.