{"version":"1.0","type":"rich","title":"Circles on a Map","description":"This visualization shows global population distribution for 2018 by placing semi-transparent circles at the centroid of each country on a natural Earth projection map, with circle area scaled to population. Users can pan and zoom via d3.zoom, and hovering over a country reveals its exact population in a tooltip. The visualization uses d3.geoPath to render country boundaries from TopoJSON and couples them with CSV data, while a custom size legend with d3.scaleSqrt and d3.format communicates the circle sizes.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/3985b7f07658470ca37ea21b180bb919?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}