{"version":"1.0","type":"rich","title":"Countries by Income - Choropleth Map","description":"This choropleth map colors countries by income group using an ordinal color scale with a blue scheme, showing each nation’s classification on a natural Earth projection. The visualization supports zooming and includes a custom color legend with circles and labels. Built with D3 v5, it uses `d3.geoPath` and `d3.geoNaturalEarth1` for map rendering, `d3.zoom` for interaction, and `d3.scaleOrdinal` for color mapping. Data combines TopoJSON world geometry with TSV metadata from the world-atlas package.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/376a2b4f2c14408985bf0f09780e61ef?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}