This interactive map uses D3.js to depict global economic data from the World Atlas TopoJSON and TSV files, coloring each country according to its economy classification. A zoomable Natural Earth projection via `d3.geoPath` shows the countries, while a custom `colorLegend` component allows users to click on legend items to highlight matching regions. The map uses `d3.scaleOrdinal` with `d3.schemeSpectral` to assign colors, and dims non-selected countries by adjusting their opacity. The visualization demonstrates fundamental D3 data-binding and event handling through reusable function patterns.