{"version":"1.0","type":"rich","title":"sized  points on a map","description":"This example visualizes the world’s most populous cities as circles sized by population, overlaid on a map of country borders and graticule lines. The cities’ circle radii are scaled with a square root scale from D3, mapping population values to a maximum radius of 18 pixels. The map uses the `geoEqualEarth` projection, `geoPath`, and `geoGraticule` from D3, with country and interior boundaries processed via TopoJSON’s `feature` and `mesh`. Geographic data comes from a World Atlas JSON file and city data from a CSV file, rendered as SVG with React.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/2e2f77785048444fa904dc9df0fc7b83?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}