{"version":"1.0","type":"rich","title":"circles on the map","description":"This map visualizes global population estimates for 2018 using circles sized by population, overlaid on a natural Earth projection. Country boundaries are drawn as SVG paths, with circles positioned at each country’s geographic centroid and scaled using a square-root scale. The visualization uses d3.geoPath for map rendering, d3.scaleSqrt for circle sizing, and a custom size legend. Data comes from a UN population estimates CSV joined with a TopoJSON world atlas, processed with the topojson feature API.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/f2e90aa577b84863a57b891ec39bb5be?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}