{"version":"1.0","type":"rich","title":"Fork of Sized Points on a Map","description":"This fork visualizes world city populations over 50,000 as semi-transparent circles sized proportionally to population. The map uses a Natural Earth projection with graticules and country boundaries rendered via `geoNaturalEarth1` and `geoPath`. React manages state and renders SVG marks, while D3’s `scaleLinear` maps population to circle radius. Data comes from Simplemaps’ World Cities Database and World Atlas TopoJSON.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/7247b5a20f8c4841bcdc57b302d08e25?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}