{"version":"1.0","type":"rich","title":"Points on a map","description":"This example displays city populations as scaled dots on a world map, using a square-root size scale to encode population values. The map is rendered with a D3 geoEqualEarth projection and geoPath, drawing land masses, graticules, and the sphere. Data comes from a CSV of world cities, fetched via D3’s `csv` method, while geographic topology is loaded as JSON and processed with TopoJSON’s `feature` and `mesh` functions. Circles are positioned by projecting each city’s latitude and longitude, with opacity set to 0.3 for a layered effect.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/cb4324b55a314225bdfa98015536e75f?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}