{"version":"1.0","type":"rich","title":"Circles on a Map","description":"This example visualizes population by country using circles on a world map, with circle area proportional to 2018 population data. Users can pan and zoom the map, and hover over countries to see detailed figures. The visualization uses d3.geoNaturalEarth1 projection with d3.geoPath for map outlines, d3.scaleSqrt for circle sizing, and a custom size legend. Population data is loaded from a CSV file, while country boundaries come from TopoJSON, and map interactions are enabled through d3.zoom.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/7bb1581a45f042518da363a85a2d274c?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}