{"version":"1.0","type":"rich","title":"Circles on a Map","description":"This visualization shows global population distribution using proportional circles on a natural Earth projection map. Circle size encodes each country’s 2018 population, with missing data shown in a distinct color. The map uses D3’s `geoNaturalEarth1` projection and `geoPath` to render borders. A `scaleSqrt` size legend and an ordinal color legend are included, and the interaction is a zoomable, event-driven map. Data comes from a UN CSV and a TopoJSON world atlas, processed via `topojson.feature`.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/ffa3aac0f45e410ab3d525492d49db2e?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}