{"version":"1.0","type":"rich","title":"Circles on a Map","description":"This visualization displays global population estimates for 2018, using a natural Earth projection to map countries. The map uses semi-transparent circles sized by population magnitude, while a color legend and size legend clarify the encoding. Built with D3 v5, the code leverages `geoNaturalEarth1` and `geoPath` for map projection, `scaleSqrt` for circle sizing, and `scaleOrdinal` for the color scheme. Data is sourced from UN population estimates joined with a TopoJSON world atlas. A tooltip on each country provides its name and population count, with missing data highlighted in light red.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/4cecc3166e2d462e9246bc413ccca08a?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}