{"version":"1.0","type":"rich","title":"Circles on a Map","description":"This interactive map displays global population data using proportional circles positioned over each country’s centroid, with a color-coded legend for categories and a size legend for population values. Built with D3 v5, it renders world geography via `d3.geoPath` and a Natural Earth projection, while applying `d3.zoom` for panning. Population values from a CSV are joined to TopoJSON features, and `d3.scaleSqrt` determines circle radii, with tooltips showing region names and formatted numbers. SVG elements and transitions animate legend updates.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/87cdd1c1d4c74a108a4f69c0e448bfa8?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}