{"version":"1.0","type":"rich","title":"Fork of Firefly Cartography","description":"This visualization renders a global map of cities with populations over 50,000 as glowing, firefly-like points on an inverted Stamen toner-lite basemap. The map is built with React and OpenLayers, using a VectorLayer with point features projected to EPSG:3857. Each point’s sprite is generated on a canvas via a radial gradient computed with d3’s cubehelix color space, creating a soft gaussian glow. City data comes from a Simplemaps World Cities Database loaded through d3.csv.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/948e52e4ea16469a969981d2cacb1b01?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}