{"version":"1.0","type":"rich","title":"Choropleth map","description":"A choropleth map visualizes global income groups using a divergent spectral color scale, with country names and income categories shown on hover. The map uses a natural Earth projection via `d3.geoPath` and supports zooming and panning through `d3.zoom`. World geometry comes from TopoJSON (50m), enriched with TSV metadata, while `d3.scaleOrdinal` drives the color mapping. A legend, built with a reusable colorLegend module, displays the categorical scale; hover effects highlight countries in red.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/d1abd70fd6644d6aa766622a4f7091a1?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}