This choropleth map colors world countries by economic classification using a categorical ordinal scale with a spectral color scheme. Users can zoom and pan the natural Earth projection, while a custom color legend displays the category colors and labels. The visualization loads geographic and metadata from the world-atlas TopoJSON and TSV files, rendering paths via d3.geoPath and enabling interaction through d3.zoom. Hovering highlights individual countries, and the legend is built with reusable d3 selections.