{"version":"1.0","type":"rich","title":"Using Size","description":"A world map displays cities with populations over 50,000, using circle size to encode population magnitude with a square-root scale. The map includes country boundaries, graticules, and a sphere outline, rendered as SVG via React. It uses `d3.geoNaturalEarth1` and `d3.geoPath` for projection, with data from the Simplemaps World Cities Database and World Atlas TopoJSON, processed through `topojson.feature` and `mesh`.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/f7948b69e37440c6b039b4d5b9309ef8?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}