This choropleth map displays global economic classifications, with each country colored according to its economy category from a tsv-loaded world-atlas dataset. A color legend allows users to click a category, which filters the map by dimming non-matching countries while highlighting the selected group. The visualization uses d3.geoNaturalEarth1 projection and d3.geoPath to render SVG paths, with d3.zoom for pan and zoom interactions. Color encoding is handled by d3.scaleOrdinal with d3.schemeSpectral, while data loading uses d3.tsv, d3.json, and topojson.feature.