{"version":"1.0","type":"rich","title":"Circles on a Map","description":"Circles on a Map visualizes COVID-19 confirmed cases by country as proportional circles overlaid on a natural Earth projection. Circle area encodes case counts via a square-root scale, and hovering highlights country boundaries with a tooltip showing the country name and case total. The visualization supports pan and zoom interactions. Built with D3 v5, it uses `d3.geoPath` with TopoJSON world data, `d3.geoCentroid` for circle placement, and a zoom behavior applied to an SVG group. Population data from the UN and case data from a CSV drive the marks.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/a58afb55954e418a9481d275be3e11a6?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}