This choropleth map displays the world’s countries colored by their economy classification, with a hover tooltip revealing each country’s name and economic group. The visualization uses `d3.geoPath` with the `geoNaturalEarth1` projection to render the globe, while `topojson.feature` loads the world atlas data and merges it with TSV metadata. An ordinal color scale applies a `schemeSpectral` range, and the custom `colorLegend` component builds an SVG legend. The map supports interactive pan and zoom via `d3.zoom`.