{"version":"1.0","type":"rich","title":"Circles on a Map","description":"This map visualizes global population estimates for 2018 by projecting country centroids onto a natural Earth projection. Circles sized proportionally to population via a square-root scale are placed at each centroid, while uniform circles represent countries lacking data. The visualization uses D3.js APIs including `geoPath`, `geoCentroid`, `geoNaturalEarth1`, `scaleSqrt`, and `scaleOrdinal`, rendering with SVG. Population data comes from a CSV of UN estimates, and country shapes from a TopoJSON world atlas.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/35fb90d946e141bb8d8f72f69cccaeb2?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}