{"version":"1.0","type":"rich","title":"Circles on a map","description":"This map visualizes global population estimates for 2018 using proportional circles overlaid on a geographic projection of the world. The visualization layers semi-transparent teal circles at each country’s centroid, with circle radius scaled by the square root of population via a legend. It employs D3’s `geoNaturalEarth1` projection, `geoPath`, and `geoCentroid` for map geometry, alongside `scaleSqrt` for sizing and `scaleOrdinal` for color. Data combines UN population CSV estimates with TopoJSON country boundaries, processed through local modules `loadAndProcessData` and `sizeLegend`.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/d7da5e1d79a34a659aea053e8dd08d5f?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}