Overview Edit

The Geographic Coordinate Data Base (GCDB) is a collection of geographic information representing the Public Land Survey System (PLSS) and some Non-PLSS surveys of the United States. It is maintained by the U.S. Bureau of Land Management (BLM).

The GCDB grid is computed from BLM survey records (official survey plats and field notes), local survey records and geodetic control information. The GCDB data, combined with PLSS alternate source data, is being used by many Federal agencies, local governments and private companies as the framework for their in-house geographic information systems (GIS).

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