This visualization presents a choropleth map of national fiscal metrics, with an interactive legend for filtering by economic category. Users click legend items to highlight matching countries and dim others. Built with D3 v5, it uses `d3.geoEquirectangular` and `d3.geoPath` to render world shapes from TopoJSON, with `d3.zoom` for panning and scaling. Data comes from CSV files joined to country IDs via `d3.csv`, with `d3.scaleOrdinal` mapping categories to the `schemeYlOrRd` color scheme.