This choropleth map colors each country by its economy category using a spectral color scale, with hover highlighting and a legend showing category colors. The visualization renders geographic data as SVG paths via d3.geoPath with a geoNaturalEarth1 projection, while d3.zoom enables pan and zoom interactions. Country names and economy values appear as tooltips on hover, sourced from world-atlas TopoJSON and TSV data combined in loadAndProcessData. The color legend, built with d3.scaleOrdinal, reduces clutter through a semi-transparent background behind its circles and labels.