{"version":"1.0","type":"rich","title":"Circles on Map","description":"This example displays a world map with circles positioned at the centroids of countries, sized to reflect their 2018 population estimates. The map uses a natural Earth projection via `d3.geoNaturalEarth1` and renders geographic boundaries with `d3.geoPath`, while circle radii are scaled with `d3.scaleSqrt`. Populated countries appear with teal circles, and gray or pink fills indicate data availability. The visualization loads population data from a CSV and country geometries from TopoJSON, and supports zooming through `d3.zoom`. Hovering reveals a tooltip with the region name and population count.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/96b8aaa538244cea919275c21a764397?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}