{"version":"1.0","type":"rich","title":"Circles on a Map","description":"This interactive map visualizes 2018 population data by country, overlaying semi-transparent teal circles on a natural Earth projection. Circle area encodes population magnitude using a square-root scale, while hover effects reveal exact figures and missing data is highlighted in red. Built with D3 v5, the visualization uses `geoPath` for map rendering, `geoCentroid` for positioning circles, and `scaleSqrt` for proportional sizing. Pan and zoom are enabled via D3's zoom functionality, with a size legend explaining the population scale.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/cecc9f0e23154947baa58b0d5c766e42?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}