This example displays a world map using an orthographic projection, rendering countries as light-green SVG paths with dark strokes. It loads geographic data from a TopoJSON world-atlas file via `d3.json`, then converts it to GeoJSON using `topojson.feature`. The map is drawn with `d3.geoPath` and `d3.geoOrthographic`, projecting the spherical landmasses onto a flat plane. The dark blue background and minimal styling emphasize the Earth’s curved shape, creating a simple globe-like visualization.