{"version":"1.0","type":"rich","title":"Sized Points on a Map","description":"This visualization presents a world map with semi-transparent circles representing cities, where point size encodes each city’s area value. The map uses a natural Earth projection via `d3.geoNaturalEarth1` and `d3.geoPath` to render landmasses, interior borders, and graticules. City positions are projected from latitude/longitude coordinates, with circle radii scaled using `d3.scaleSqrt`. The React component fetches world atlas TopoJSON and city data from a CSV URL, rendering SVG elements within a `Marks` component.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/69b418c0d8f14ad1809159d12969e3fa?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}