{"version":"1.0","type":"rich","title":"Sized Points on a Map","description":"A world map displays cities with populations over 50,000 as semitransparent circles, sized proportionally to their population using a square-root scale. The visualization uses React for the user interface and D3 v5’s `geoNaturalEarth1` projection with `geoPath` to render country boundaries, graticules, and a sphere backdrop. City data comes from Simplemaps, while country shapes come from World Atlas TopoJSON. Circles are positioned via the projection and sized using `scaleSqrt` from D3, with opacity set through CSS.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/5cf1cba375ab41d1b02cd8fb75725b1c?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}