{"version":"1.0","type":"rich","title":"Circles on A Map","description":"This visualization displays global population estimates for 2018 by drawing semi-transparent circles on a natural Earth projection map, with each circle positioned at a country's centroid and sized proportionally to its population. The map also includes a size legend and color legend for reference. Built with D3 v5, it uses `d3.geoNaturalEarth1` and `d3.geoPath` for map rendering, `d3.scaleSqrt` for circle sizing, and `d3.zoom` for interactivity. Population data comes from a UN dataset, with geographic boundaries from TopoJSON, and all elements are rendered as SVG.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/f90d51a294144ecdb435c77a0c972913?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}