{"version":"1.0","type":"rich","title":"Sized Points on a Map","description":"A world map displays cities with populations exceeding 50,000 as semi-transparent teal circles, with the circle radius scaled by the square root of each city’s population. The map uses a natural Earth projection with graticules and country boundaries derived from World Atlas TopoJSON, processed via the `topojson` `feature` and `mesh` APIs. City data comes from a Simplemaps CSV, and the visualization is built with React and D3, using `d3.geoPath` for map features and `d3.scaleSqrt` for the size encoding.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/5150df878a9842eb8970d377d784eec0?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}