{"version":"1.0","type":"rich","title":"Sized Points on a Map","description":"A world map displays COVID-19 cumulative cases for cities with populations over 50,000, using sized circles where radius encodes case count via a square-root scale. The visualization uses React with D3 v5 APIs including `geoNaturalEarth1`, `geoPath`, and `geoGraticule` to render country boundaries, graticules, and city points as SVG circles. Data comes from the World Health Organization via a CSV file, with country shapes from World Atlas TopoJSON.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/c2e97881b3db4e1e8a59509b7dcbdbb9?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}