{"version":"1.0","type":"rich","title":"Points on a Map","description":"This example displays world cities as scaled circles on a natural Earth projection, with each circle’s radius proportional to its population. The map renders landmasses, graticules, and interiors using `d3.geoPath` and `d3.geoNaturalEarth1`, while the city points are drawn as SVG circles with a square-root scale for size encoding. The visualization loads geographic topology from `world-atlas` and city CSV data via `d3.csv`, using React hooks (`useState`, `useEffect`) to manage the asynchronous data fetching and triggering re-renders.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/e3dfc855a12a4eea8fd70de515cdc2be?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}