{"version":"1.0","type":"rich","title":"Choropleth map","description":"This choropleth map displays countries colored by economic classification using a spectral color scale. Users can click legend items to highlight all countries in that category while dimming others, with zoom and pan via `d3.zoom`. The map is rendered with `d3.geoPath` and `d3.geoNaturalEarth1` projection using TopoJSON data from the world-atlas dataset. A legend, built with custom SVG circles and text, provides interactive filtering, and hover effects change country fill colors.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/c0c28744c0fc4450a5a76417d7dc0573?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}