{"version":"1.0","type":"rich","title":"Circles on a Map","description":"This visualization depicts global population data for 2018, using proportional circles on a natural Earth projection map. Country boundaries are rendered as SVG paths via `d3.geoPath`, while circle areas encode population using `d3.scaleSqrt`. Pan and zoom are enabled through a custom `zoom` event handler. Data is loaded from a CSV file and a TopoJSON world atlas, merged by country code. A size legend clarifies the scaling, and hovering on a country reveals its name and population via a tooltip.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/56bb84ef0a454fd887c0857b393af423?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}