{"version":"1.0","type":"rich","title":"Points on a Map","description":"This example visualizes cities with populations over 50,000 as semi-transparent circles on a natural Earth projection. The map displays country boundaries, interiors, graticules, and a sphere outline, with circle size scaled by population using `d3.scaleSqrt`. The React-based visualization uses `d3.geoPath` for geographic rendering and `d3.geoNaturalEarth1` for projection, with city data loaded from Simplemaps via CSV and country shapes from World Atlas TopoJSON.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/a972676f497d4faeadeb60ba541116d0?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}