{"version":"1.0","type":"rich","title":"Circles on a Map","description":"This visualization uses a natural Earth projection to display the population of each country as a circle, where the circle's area is proportional to the country's 2018 population. Users can pan and zoom the map, and hovering over a country reveals its name and population in a tooltip. The D3 code loads data from a UN CSV and a TopoJSON world atlas, computing circle sizes with `d3.scaleSqrt` and rendering the map using `d3.geoPath`. A size legend and a color legend for missing data are also included.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/007bb10413b24fd7bc6cc8661738860d?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}