This example displays a world map with countries filled in light green, rendered on a blue spherical backdrop. The map allows panning and zooming through the d3 zoom event, which applies a transform to the map group. The visualization uses the `d3.geoPath` and `d3.geoNaturalEarth1` APIs to project geographical data, and the `topojson.feature` function to convert TopoJSON into GeoJSON features. Country names are loaded from a TSV file from the world-atlas package and displayed as tooltips via SVG `title` elements.