This choropleth map visualizes countries by their economic classification using a red-yellow-green color scale. Built with React and D3, it renders geographic boundaries via the `d3.geoPath` projection on a natural Earth base layer, with country data loaded from TopoJSON and TSV files. A color legend with animated transitions shows the ordinal scale mapping, and the map supports interactive zooming through `d3.zoom` events, while hover states provide tooltips with country names and economic values.