{"version":"1.0","type":"rich","title":"Circles on a Map","description":"This visualization displays global population by country using scaled circles positioned at each country’s geographic centroid. Circle area corresponds to population magnitude, with a square-root scale controlling radius. The map supports pan and zoom, and hovering over a country reveals its name and population. Built with D3 v5, it uses `d3.geoNaturalEarth1` for projection, `d3.geoPath` for rendering country outlines from TopoJSON, and `d3.zoom` for interaction. Population data is loaded from a CSV file, and a custom size legend displays tick values using `d3.scaleSqrt`.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/35d0818f3d8743a5a184d86b7753dff1?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}