{"version":"1.0","type":"rich","title":"Choropleth map","description":"A choropleth map colors world countries according to their economic classification, with a color legend that filters and highlights selected categories. Users can click legend entries to dim non-matching countries and intensify the selected region. Built with D3.js, the visualization uses `d3.geoNaturalEarth1` and `d3.geoPath` to project TopoJSON data from the world-atlas package, while `d3.scaleOrdinal` with `d3.schemeSpectral` assigns colors. Interactive zoom via `d3.zoom` and SVG rendering provide the map interface.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/4292b5c686854282bd9c89886d566f6b?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}