{"version":"1.0","type":"rich","title":"Circles on a Map","description":"Animated circles on a natural Earth projection map visualize COVID-19 confirmed cases and deaths over time, with circle area encoding magnitude. Data is drawn from a temporal CSV and merged with country geometries loaded via TopoJSON. Hovering reveals population figures. Users can pan and zoom, while a color legend distinguishes levels. The visualization uses D3 v5 APIs including `geoPath`, `geoNaturalEarth1`, `scaleSqrt`, `zoom`, and transitions.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/d29235bd023b47ffb452fcb2a3a83783?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}