This choropleth map displays world economies using a color scale mapped to each country, with dimming and highlighting applied when a legend category is selected. Built with D3 v5, it uses `d3.geoNaturalEarth1` and `d3.geoPath` for projection and rendering, and `d3.zoom` for panning and zooming. A clickable legend, rendered via custom D3 selections, filters the map by economy type, while data is loaded from TopoJSON and TSV files using `d3.json` and `d3.tsv`. The map renders as SVG with hover effects and interactive focus.