{"version":"1.0","type":"rich","title":"Choropleth Map","description":"A choropleth map colors world countries by their economy category using a spectral ordinal color scale, with an interactive color legend rendered as circles and labels. The visualization loads country geometries from TopoJSON and joins them with tabular metadata via a promise-based data pipeline. Rendered as SVG, it uses `d3.geoPath` with a Natural Earth projection and supports zooming through `d3.zoom`. Hovering highlights countries, while the legend is built using the exported `colorLegend` helper, with styling defined in external CSS.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/7b262fcc446f4d4fa495016aa77a1972?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}