A world map spins continuously to show all continents and the graticule grid, rendered as an orthographic projection that creates the illusion of a rotating globe. The code uses `d3.geoOrthographic`, `d3.geoPath`, and `d3.geoGraticule` to draw the sphere outline, graticule, and country borders, with data loaded from the visionscarto world-atlas TopoJSON file via `topojson-client`. Animation is driven by `requestAnimationFrame` in React, updating the projection’s rotation array each frame.