{"version":"1.0","type":"rich","title":"Sized Points on a Map","description":"This visualization displays global cities with populations exceeding 50,000 as semi-transparent circles sized proportionally to population using a square-root scale. The map uses a natural Earth projection, with country boundaries, interiors, and graticules rendered via d3.geoPath from TopoJSON world-atlas data. City coordinates are projected using d3.geoNaturalEarth1, with population data loaded from a Simplemaps CSV. The React component applies the size scale to each circle’s radius, creating an immediate visual comparison of urban population distribution across continents.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/df4f6a19ca7c4c84bd0f1070358015d3?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}