{"version":"1.0","type":"rich","title":"Choropleth Map with Interactive Filtering","description":"A choropleth map of the world displays a categorical color scale, coloring each country by its economy income group. The map uses a geographic projection and SVG paths via `d3.geoPath` and the `geoAlbersUSA` projection. The color legend, built with `d3.scaleOrdinal` and `schemeSpectral`, shows discrete categories; clicking a legend item filters the map by fading non-matching countries to low opacity while highlighting the selected category. The data originates from a TopoJSON file and a TSV table loaded concurrently, which are merged by country ID.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/175ae2b3e8cb4fc29b7cf25ee8654844?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}