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GEOGRAPHIC ENCODING AND REFERENCING ACCURACY IMPROVEMENT PROJECT

October 10, 2001
The Geography Division, United States Census Bureau, is conducting a competition to enter into a long-term contract for the delivery of a more accurate TIGER database, a structure coordinate with an address for each that can be linked with the Master Address File. The objective of the project is to improve the accuracy of the TIGER database. A major objective of the contract is to enhance the accuracy of the coordinates in the TIGER database for all the counties in the United States, Puerto Rico and associated island area. Content of the TIGER database that requires alignment includes roads, hydrography, railroads, structures, landmarks and more. The horizontal accuracy required for realignment of TIGER coordinates is such that the geographic positional coordinates will place an enumerator, relying on a GPS receiver, at the desired structure 100 percent of the time.

Michael L. Palensky or Phil Hodges, 301-457-4420