{"version":"1.0","type":"rich","title":"Untitled","description":"This example shows a world map with cities whose populations exceed 50,000, rendered as semi-transparent circles sized by the square root of their population. The map includes landmasses, country interiors, graticules, and a background sphere, all drawn using `d3.geoPath` with the Natural Earth projection (`geoNaturalEarth1`). City data comes from a Simplemaps CSV loaded via `d3.csv`, while country boundaries are derived from World Atlas TopoJSON processed with `topojson.feature` and `mesh`. The visualization is built with React and D3 v4, using `scaleSqrt` to map population values to circle radii.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/6c5555afa846489d917fb59beae533a7?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}