This interactive choropleth map displays global economic classifications by country, with a color legend that filters highlights when clicked. Built with D3 v5, it uses `geoNaturalEarth1` projection, `geoPath`, and `geoZoom` for pan and zoom interactions. The map renders SVG paths from TopoJSON world atlas data, while an ordinal color scale applies a spectral scheme. Hovering changes country fill, and selecting a legend category dims non-matching regions.