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GEOGRAPHIC COORDINATE DATABASE (GCDB)

The Geographic Coordinate Data Base (GCDB) is built from the Public Land Survey System (PLSS) records and other source documents, and contains geographic coordinates such as latitude and longitude at the corner points of the rectangular surveys and special surveys (i.e., mineral surveys, homestead entry and tract surveys, etc.). The accuracy of the coordinate value generated for a corner point through GCDB, is in direct relationship to the era of survey or source document, e.g. coordinates generated through GCDB from surveys conducted in the 1800’s utilizing technology common to-the-day, have lower accuracy reliability than those coordinates generated from today’s Global Positioning System (GPS) technology. The GCDB is designed to be the base layer which anchors the resource data to the legal description of the land and its position or location on the earth’s surface.  
 

 Information and Reference Links
 
DOWNLOAD GCDB LAND RECORD DATA
GCDB USERS GUIDE
BLM GCDB NATIONAL HOME PAGE
NATIONAL INTEGRATED LAND SYSTEM (NILS)
CORPSCON - U. S. Army Corp of Engineers Coordinate Conversion Program
 

Drawing of an Eagle holding a Cadastral Survey banner

 GCDB Update Schedule 

GCDB Status Map

Map showing GCDB FY 2007 update status


Questions about this program can be directed to: 
Bob Thompson
Cadastral Survey, BLM Nevada State Office
1340 Financial Blvd.
Reno, NV 89502
Phone: 775-861-6545
Fax: 775-861-6634