{"version":"1.0","type":"rich","title":"Circles on a map","description":"This example displays a natural Earth projection world map with semi-transparent teal circles overlaid on each country, sized according to estimated 2018 population data from the UN. The map uses `d3.geoPath` and `d3.geoNaturalEarth1` to render country outlines from TopoJSON, while `d3.scaleSqrt` maps population values to circle radii. A legend with `d3.scaleSqrt` ticks and a color legend for missing data accompany the visualization, which supports zooming via `d3.zoom`.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/1d9bd90930bd4aafa2aa0b5b64f2d5c9?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}