{"version":"1.0","type":"rich","title":"Circles on a Map","description":"This visualization displays global population by country in 2018, with circles sized proportionally to population counts overlaid on a natural Earth projection map. The map supports pan and zoom interactions, and hovering over countries reveals population data or missing-data indicators. Built with D3 v5, the example uses `d3.geoPath` for map rendering, `d3.geoNaturalEarth1` for projection, `d3.zoom` for interaction, and `d3.scaleSqrt` for circle sizing, while styling and legend components are defined in separate JavaScript modules. Population data comes from a UN estimates CSV, with country boundaries from a TopoJSON world atlas.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/74b19c4258c64c60ba53f2f4ff314c40?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}