A choropleth map displays global economic classifications using an orthographic projection that auto-rotates over time. Users can click color legend items to filter countries by economy type, dimming non-matching regions while highlighting selected ones. The visualization uses d3.geoPath for map rendering, d3.zoom for pan and zoom interactions, and d3.forceSimulation-style timers for rotation. Geographic data comes from world-atlas TopoJSON files loaded via topojson.feature, with economy data merged from TSV metadata. Hover tooltips show country names and values through SVG title elements.