This interactive choropleth map displays global economic classifications by country, with a color-coded legend that filters and highlights selected regions. The map uses D3 v5 with `geoNaturalEarth1` projection, `geoPath` for rendering SVG paths, and TopoJSON data from the world-atlas dataset. Users can click legend categories to emphasize matching countries while dimming others, and zoom/pan the map via D3’s `zoom` behavior. A spectral color scale maps ordinal economy values, with tooltips showing country names and values.