A choropleth map colors countries by their economy classification using an ordinal color scale with a spectral scheme. The visualization loads geographic data from the World Atlas TopoJSON and TSV files, projecting it with d3.geoNaturalEarth1 and rendering paths via d3.geoPath. Hovering highlights a country in red, while a custom color legend component displays the categorical ranges. Zooming is enabled through d3.zoom, and the map includes a static sphere background.