This choropleth map visualizes countries’ economic classifications using a color scale based on the world-atlas TopoJSON dataset. The map renders with d3.geoPath and a natural Earth projection, while a d3.scaleOrdinal with schemeSpectral colors fills each country. Hovering highlights countries in pink, and a color legend explains the ordinal scale. Users can zoom and pan via d3.zoom, with all interaction and styling implemented in SVG.