A choropleth map colors each country according to its economy category, using an ordinal color scale with a spectral scheme. The visualization loads world geography from TopoJSON and country metadata from TSV, then renders the map as SVG paths with a natural Earth projection. Hovering highlights a country in red, and a custom color legend displays the category colors. The map supports zooming and panning through d3.zoom, with d3.geoPath generating the geographic shapes.