This example displays a world map using an orthographic projection, rendered as SVG with D3’s `geoPath` and `geoOrthographic`. It shows landmasses filled in teal, graticules, sphere outline, and interior borders, drawing from the world-atlas TopoJSON dataset (countries-50m.json) via `feature` and `mesh`. React manages the component state, loading data asynchronously with a custom `useData` hook before rendering the map within a fixed SVG canvas.