This map uses a choropleth encoding to color countries by economic classification. The visualization is built with the D3.js v5 library, leveraging its geoNaturalEarth1 and geoPath APIs to project and draw the world map. Country colors come from a categorical scale, and users can hover to highlight regions. The interaction is handled with D3's zoom event and rendered as an SVG, sourcing data from the world-atlas TopoJSON and TSV files.