This map visualizes global country boundaries by projecting the Natural Earth 110m dataset onto a blue sphere using the Natural Earth projection. The code employs D3.js v5's `geoPath` and `geoNaturalEarth1` for geographic rendering, while TopoJSON’s `feature` function extracts country features from the world-atlas JSON. Each country is drawn as a light-green SVG path with subtle black stroke opacity, with the sphere outline added separately.