{"version":"1.0","type":"rich","title":"Choropleth map","description":"This choropleth map colors countries by their income group using a categorical color scale applied from the `schemeSpectral` range. The visualization renders geographic boundaries from TopoJSON data processed with `topojson.feature` and projects them using `d3.geoNaturalEarth1` and `d3.geoPath`. A legend, built with a custom `colorLegend` function, displays the colored circles and labels for each income category. Country names and income groups appear as tooltips via SVG `title` elements, and the map supports zooming through `d3.zoom`.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/2b434e4bc745451ba81d03ad6bd11857?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}