{"version":"1.0","type":"rich","title":"Choropleth Map with Interactive Filtering","description":"A choropleth map shows world countries colored by economic development group, with an interactive color legend that filters which regions remain highlighted. Users click legend items to isolate a category, dimming all other countries and brightening the selected ones. The map uses a natural Earth projection via `d3.geoPath` and `geoNaturalEarth1`, with country boundaries drawn from TopoJSON data. The legend is built with D3 scales and SVG circles, while `d3.zoom` enables panning and zooming on the map.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/ebb8db05ceb14101ad93db1fed0fbba5?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}