{"version":"1.0","type":"rich","title":"Sized Points on a Map","description":"This example displays cities with populations over 50,000 as sized points on a world map, using a square-root scale to encode population by circle radius. The map renders with the `geoNaturalEarth1` projection and `geoPath` in React, showing graticules and country boundaries from World Atlas TopoJSON. City data comes from Simplemaps via CSV, loaded with `d3.csv`. Circles are drawn with SVG, styled with a teal fill and 0.3 opacity.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/e3aa2763ba8e4d6b9fc60fff3640eccf?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}