{"version":"1.0","type":"rich","title":"Sized Points on a Map","description":"A world map displays cities with populations over 50,000, using scaled circle radius to encode population size. The visualization combines a Natural Earth projection rendered through d3.geoPath with graticules and country boundaries from World Atlas TopoJSON. City data comes from Simplemaps’ World Cities Database, loaded via d3.csv and projected onto the map. Circle sizes use d3.scaleSqrt for area encoding, with React managing the SVG rendering and d3.v5 providing the geographic and data utilities.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/65f9f59e964c469ea3cb0bd271793be8?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}