This choropleth map visualizes the economic classification of countries across the globe, using color to encode each nation’s economy category. The map is rendered with D3.js v5, using `geoNaturalEarth1` projection and `geoPath` to draw country boundaries. Country data is loaded from the world-atlas TSV and TopoJSON files, with the `economy` property mapped to a spectral color scale. Hovering over a country displays its name and economy type, while a custom color legend explains the color mapping. A zoom interaction is also implemented via `d3.zoom`.