This example visualizes world country boundaries and landmasses using a natural Earth projection, rendered as SVG paths. It displays graticules and interior borders alongside a styled sphere, with land and water distinguished by teal and blue fills. The visualization uses React with D3 v5, specifically `geoNaturalEarth1`, `geoPath`, and `geoGraticule` for geographic projections. Data comes from the World Atlas TopoJSON, processed via `topojson.feature` and `topojson.mesh` to extract land polygons and country boundaries.