{"version":"1.0","type":"rich","title":"Grid Sampling on Census Tracts - Contours from Sampling","description":"This interactive map displays the distribution of the Black population across New York City census tracts. It creates and renders contour polygons derived from a grid-sampled raster of demographic data, which is then blurred and thresholded using D3’s `contours` and `blur2` APIs. The contours are converted to GeoJSON via Turf, while the base layer uses `geoOrthographic` and `geoPath`. County data comes from the 2023 Census Tracts shapefile, enriched with ACS demographic estimates.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/1e7929b9c36b428a9e10526c0ac33ac7?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}