This visualization uses a D3.js geoPath and geoNaturalEarth1 projection to render a world map, overlaid with circles sized by population data from a 2018 UN dataset. Countries with missing data are filled in dark red, while those with data are light beige. The sizing and color legends are implemented via custom modules, and the map supports zooming through D3's zoom event. Hovering over a country reveals its name and population, formatted with D3's format function.