{"version":"1.0","type":"rich","title":"Circles on a map","description":"This visualization displays the global distribution of total COVID-19 cases as of August 30, 2020, using proportional red circles overlaid on a natural Earth projection map. The map is rendered with SVG, using d3.geoPath for country outlines and d3.geoCentroid to position each circular marker. Circle radii are scaled with d3.scaleSqrt, while a color legend uses d3.scaleOrdinal with a spectral scheme to categorize data. Interactive zooming is enabled through the d3.zoom module, and data is loaded from a CSV file and TopoJSON world atlas using d3.csv and topojson.feature.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/7b88c76e48ab4e69ae5d42353a0d1dc8?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}