{"version":"1.0","type":"rich","title":"Choropleth map with interactive filtering","description":"A choropleth map of world countries colored by income group, with interactive filtering through a color legend. Clicking a legend category highlights matching countries and dims others; clicking again clears the filter. The map uses a natural Earth projection via `d3.geoNaturalEarth1` and `d3.geoPath`, with zoom controls from `d3.zoom`. It loads TopoJSON country boundaries from the world-atlas dataset, merges names from a TSV file, and renders in SVG with `d3.scaleOrdinal` and `schemeSpectral`.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/72cfc1ca802f425d957c51a9e320f5f9?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}