This choropleth map uses color to show the economy classification of countries, with a legend displaying the ordinal color scale. The visualization is built with D3 v5, using `d3.geoPath` and the `geoNaturalEarth1` projection to render world map features from a TopoJSON dataset. It employs `d3.scaleOrdinal` with a `schemeSpectral` color range to map economic groups, and includes interactive zooming via a custom `zoom` function.