This choropleth map colors world countries by economic classification using a categorical color scale. The visualization renders geographic boundaries with SVG paths projected via `d3.geoNaturalEarth1` and `d3.geoPath`, with interactive zoom support through `d3.zoom`. A custom `colorLegend` component displays the ordinal scale’s categories as colored circles with labels. Data loads from the World Atlas TopoJSON and TSV files, with country names and economy values shown in tooltips on hover. The map uses `d3.scaleOrdinal` with `schemeSpectral` to assign distinct fills to each economic group.