{"version":"1.0","type":"rich","title":"Circles on a Map","description":"This visualization displays global population data for 2018 as circles on a natural Earth projection map. Countries without data are shown in one color, while those with data use a square-root size scale to encode population magnitude. The code uses d3.geoPath for map rendering, d3.geoCentroid for positioning, and d3.scaleSqrt for circle sizing. Data comes from a CSV file joined with TopoJSON world atlas features, with interactive zoom via the d3.zoom API.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/4a4663f8d9474b569841a7e773cd70ef?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}