{"version":"1.0","type":"rich","title":"Choropleth Map with Interactive Filtering","description":"A choropleth map uses a spectral color scale to depict national economies, rendered as SVG paths with D3's geoNaturalEarth1 projection and geoPath. Clicking a color legend tick filters the map by dimming non-matching countries to 10% opacity while highlighting the selected category, and also fades the background sphere. The legend, built with custom colorLegend logic, supports re-clicking to clear the filter. Data joins World Atlas TopoJSON with TSV income and economy metadata via topojson.feature and D3's tsv loader.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/ffb90f6b3ffe4b91b01d88d39d475e60?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}