This choropleth map colors countries by their economy type, using a spectral color scale with a linked legend that filters the map when clicked. The visualization renders world geography as SVG paths via d3.geoPath with a geoVanDerGrinten4 projection, and supports zooming through d3.zoom. Data comes from the World Atlas TopoJSON dataset, merged with TSV metadata, while the legend uses an ordinal scale and interactive ticks to highlight or dim matching countries.