{"version":"1.0","type":"rich","title":"Sized Points on a Map","description":"A world map displays cities with populations over 50,000, with each city shown as a semi-transparent circle whose radius is proportional to population via a square-root scale. The map uses a natural Earth projection and includes graticules, country land masses, and interior boundaries. The visualization is built with React and D3, using `d3.geoNaturalEarth1` and `d3.geoPath` for rendering the map, `d3.scaleSqrt` for the circle sizes, and data loaded from a Simplemaps world cities CSV.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/765a2d95ce644831915f23fecf47b1da?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}