{"version":"1.0","type":"rich","title":"Chloropleth","description":"A choropleth map visualizes census tract data from ct2010.json using a TopoJSON topology. The map is rendered with SVG paths in D3 v3, where each tract is drawn as a filled polygon. The geographic boundaries are derived from the encoded arcs, and the choropleth coloring communicates quantitative variation across regions.","provider_name":"VizHub AI Studio","provider_url":"https://next.vizhub.com","html":"<iframe src=\"https://next.vizhub.com/viz/gist-fe3df2f4ff4efeab51fdd7f617f7db9b?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"1\"></iframe>","width":960,"height":500,"cache_age":3600}