A world map visualization displays global landmasses and country boundaries using a natural Earth projection rendered as SVG. The map shows land areas in teal, country interior borders in a lighter stroke, and background graticule lines. Built with React and D3 v5, the code uses `geoNaturalEarth1`, `geoPath`, and `geoGraticule` to generate the projection and paths. TopoJSON data from the World Atlas dataset provides the land and country mesh features, which are processed through the `feature` and `mesh` APIs.