{"version":"1.0","type":"rich","title":"Circles on a Map","description":"This example uses a natural Earth projection to visualize population by country with scaled circles. The area of each circle corresponds to the country’s 2018 population, rendered as SVG paths and circles via `d3.geoPath` and `d3.geoNaturalEarth1`. Users can pan and zoom with `d3.zoom`, hover for country details, and read a square-root size legend built from `d3.scaleSqrt`. Data combines UN population CSV values with TopoJSON world geometry through `d3.csv` and `d3.json`.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/9e9469131e5f449096396185ba0b9241?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}