{"version":"1.0","type":"rich","title":"CPSC 436V Week 6 - Circles on a Map","description":"This map visualization displays global population estimates for 2018 using circles overlaid on a geographic projection. Semi-transparent cyan circles, sized by population magnitude, are placed at country centroids using `d3.geoCentroid` and rendered with `d3.geoNaturalEarth1` and `d3.geoPath`. A size legend with `d3.scaleSqrt` and a color legend explain the mapping. Data comes from a UN population CSV merged with TopoJSON world boundaries; zooming is enabled via `d3.zoom`, and hover reveals population details.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/fc44bc2d1185451cbf49b2f20ce745a4?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}