{"version":"1.0","type":"rich","title":"Sized Points on a Map","description":"This visualization shows a world map with cities as sized points, where each circle’s radius reflects population using a `scaleSqrt` in d3. It renders a natural Earth projection with `geoNaturalEarth1` and `geoPath` for country boundaries, interior borders, and graticules. City coordinates are projected from longitude and latitude, with population data loaded via `d3.csv` from a Simplemaps dataset. The React-based code uses reusable `Marks` components, while SVG circles are semi-transparent to reveal overlapping urban areas.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/2551ca1a746346c1a3e436f88778b6be?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}