{"version":"1.0","type":"rich","title":"Circles on a Map","description":"This visualization displays the global population infected by COVID-19, using proportional circles placed at country centroids on a natural Earth projection. The map shows both countries with and without reported data, colored differently, while a size legend and color legend explain the scaling. The implementation uses d3's geoPath, geoNaturalEarth1, and geoCentroid for map projections, and scaleSqrt for circle sizing, with data loaded from a CSV and TopoJSON atlas.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/7b8ebe0f898947f1ba6eb5c2148dbfcf?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}