{"version":"1.0","type":"rich","title":"Points on Map Size","description":"This example visualizes the world's largest cities as proportional circles on a natural Earth projection, using a square-root size scale to encode population. The map is built with React and D3 v5, employing `geoNaturalEarth1` and `geoPath` to render land masses, graticules, and a sphere, while `geoGraticule` adds reference lines. City data originates from a CSV of world cities, loaded via D3's `csv` function, and the World Atlas TopoJSON supplies country boundaries. The SVG circles, styled with a teal fill and opacity, are positioned using the projection and sized based on population.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/f1477ca8304740acb3ae9daa15cf028c?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}