This example displays a natural Earth projection map with countries filled in light green and the ocean shown in blue, using an SVG rendering approach. The code loads world geography data from the world-atlas TopoJSON file and converts it to GeoJSON features via TopoJSON’s feature function. D3’s geoNaturalEarth1 projection and geoPath generator define the map’s layout, while the visualization waits for the JSON promise to resolve before appending country paths with a stroke for borders. The sphere outline is drawn separately from a GeoJSON Sphere object.