This example displays a world map with landmasses, graticules, and country interiors using D3’s `geoNaturalEarth1` projection. The visualization loads country boundaries from the `world-atlas` package via `topojson`’s `feature` and `mesh` functions, rendering areawithin an SVG using React. The map’s sphere is light gray, land is teal, and interior boundaries are drawn in a lighter teal, while the graticule appears as thin grey lines. The code relies on `geoPath` to project geographic data and `geoGraticule` to generate the grid.