{"version":"1.0","type":"rich","title":"Choropleth Map","description":"This choropleth map shows countries colored by income group, with a clickable color legend that highlights matching regions and a pan-and-zoom interface. It uses D3 v5 with `geoNaturalEarth1` and `geoPath` to project TopoJSON world data loaded from the World Atlas, while `scaleOrdinal` and `schemeSpectral` assign colors. A zoom behavior updates the map transform on interaction. The legend, rendered with SVG circles and text, triggers the selection filtering.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/6c96458d0be6451ab039adf340406a4e?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}