This choropleth map displays global economic groups using an ordinal color scale, where each country is colored by its economy category. Users can click legend items to highlight matching countries while dimming others, and hover over countries to see their name and economy value in a tooltip. The visualization uses d3.geoNaturalEarth1 projection with d3.geoPath to render country boundaries, and incorporates d3.scaleOrdinal with a spectral color scheme for categorical coloring. The map includes zoom functionality via d3.zoom, and data is loaded from the world-atlas package using d3.tsv and topojson.feature.