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The TIGER files do not contain the census demographic data, but merely the geospatial/map data. GIS can be used to merge census demographics or other data sources with the TIGER files to create maps and conduct analysis. TIGER data is available without cost because U.S. Government publications are required to be released into the public domain.
Spatial Data File – high-performance geodatabase format, native to MapGuide (by Autodesk) TIGER – Topologically Integrated Geographic Encoding and Referencing Vector Product Format – National Geospatial-Intelligence Agency (NGA)'s format of vectored data for large geographic databases
U.S. Gazetteer, TIGER/Line shapefiles, census data. National Historical Geographic Information System: NHGIS provides free of charge, aggregate census data and GIS-compatible boundary files for the United States between 1790 and 2012. Atlas of Historical County Boundaries Project (AHCBP)
A third category between these would include formats that are owned exclusively by one company or organization, but are published and available for implementation by anyone, such as the Esri Shapefile. [5] Some file formats are text files that can be read by humans (such as those based on XML or JSON), especially those intended for data ...
In each of the .shp, .shx, and .dbf files, the shapes in each file correspond to each other in sequence (i.e., the first record in the .shp file corresponds to the first record in the .shx and .dbf files, etc.). The .shp and .shx files have various fields with different endianness, so an implementer of the file formats must be very careful to ...
Currently, the best source for nationwide LiDAR availability from public sources is the United States Interagency Elevation Inventory (USIEI). [1] The USIEI is a collaborative effort of NOAA and the U.S. Geological Survey, with contributions from the Federal Emergency Management Agency, the Natural Resources Conservation Service, the US Army Corps of Engineers, and the National Park Service.
Original file (1,275 × 1,650 pixels, file size: 2.99 MB, MIME type: application/pdf) This is a file from the Wikimedia Commons . Information from its description page there is shown below.
English: Indian Land Areas Judicially Established 1978 and American Indian Reservations This map was created by the Bureau of Indian Affairs (BIA) Office of Trust Services (OTS) Division of Water and Power (DWP) and is currently retained and disseminated by the BIA Branch of Geospatial Support (BOGS) function, Lakewood, CO.