{"version":"1.0","type":"rich","title":"points on world map with text input","description":"This visualization displays the populations of major world cities as scaled circles on a natural Earth projection map. A dropdown menu selects how many top cities to show, while a slider adjusts the maximum circle radius. The map uses D3’s `geoNaturalEarth1` and `geoPath` for rendering landmasses and graticules, with `scaleSqrt` mapping population to circle area. Data comes from the Data Canvas Sense Your City dataset, loaded via `d3.csv` and TopoJSON world atlas features.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/0e4d20a74d7a4e498d6699c68057d232?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}