{"version":"1.0","type":"rich","title":"Circles on a Map","description":"This visualization displays global population data for 2018 as colored circles positioned on a natural Earth projection map. Countries are shaded with a spectral color scale, while circle size encodes population magnitude using a square-root scale. The code loads CSV and TopoJSON data with d3.csv and d3.json, then renders the map using d3.geoPath and d3.geoNaturalEarth1, with circles placed via d3.geoCentroid and scaled by d3.scaleSqrt.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/795dab7380bd44258def90ed9b5809da?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}