{"version":"1.0","type":"rich","title":"Census Tract Quadtree Aggregation","description":"This map of New York state visualizes census tract demographic data as an interactive choropleth. It uses an R-tree spatial index to sample tract values onto a uniform grid, then aggregates those samples into a quadtree for efficient pan and zoom rendering. The map is drawn as colored rectangles on a Canvas via `d3.geoPath`, with color scales from `d3.interpolateTurbo`.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/3b6964aed64041bbbd6e26fa87ef4965?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}