{"version":"1.0","type":"rich","title":"Color ramp for a topology","description":"A color ramp encodes a topology of traffic density in the Troparevo-Nikulino district, with each road segment colored by a normalized `cars` value. The CartoCSS styles define nested thresholds from red (high traffic) to blue (low traffic), using CSS attribute selectors like `[cars<0.5]` to adjust line color and opacity. A second, glow layer overlays thicker, semi-transparent lines to emphasize the density gradient. The rendering relies on Mapnik’s CartoCSS syntax, processing the point and line layers from the GeoJSON data source.","provider_name":"VizHub AI Studio","provider_url":"https://next.vizhub.com","html":"<iframe src=\"https://next.vizhub.com/viz/gist-3791207?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"1\"></iframe>","width":960,"height":500,"cache_age":3600}