This interactive choropleth map visualizes countries colored by economic classification, using a spectral color scale with a legend for reference. The map responds to zoom and hover interactions, highlighting countries on hover. Built with d3.js, it uses `geoPath` and `geoNaturalEarth1` for geographic projection, `scaleOrdinal` and `schemeSpectral` for coloring, and a custom `colorLegend` component. Data is loaded from world-atlas TSV and TopoJSON sources, rendered as SVG paths on a blue sphere background.