This choropleth map shows global economies colored with a sequential green scale, with a hover effect that highlights individual countries and a legend displaying the ordinal color categories. The visualization uses d3.geoPath with a natural Earth projection to render country boundaries from TopoJSON data provided by the world-atlas package, while loadAndProcessData merges TSV metadata with the geometry. Interactions include d3.zoom for panning and zooming the map, and colorLegend renders the categorical legend as an SVG group with circles and text labels.