This fork of a choropleth map colors countries by their economy category using a spectral color scale. The map is rendered with SVG paths generated by `d3.geoPath` and the Natural Earth projection, with country names and values shown as tooltips. The visualization includes a custom color legend built with `d3.scaleOrdinal`, and users can pan and zoom via the `d3.zoom` event handler. Data is loaded from the World Atlas TopoJSON and TSV files.