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Topological face polygons from the U.S. Census Bureau's TIGER/Line database for Brown County, Illinois, containing all geographic area codes used for 2020 Census and annual survey tabulation. Each face has a unique topological face identifier (TFID) and can be combined with other shapefiles to create a seamless national map.
Files are provided in ZIP and XML formats, requiring GIS software (e.g., QGIS, ArcGIS) or specialized libraries for spatial data processing. Users must combine this file with others for national coverage.