Because of the federal government shutdown, ngmdb.usgs.gov is not being updated and the agency will not be able to respond to inquiries until appropriations are enacted. For more information please visit: https://www.doi.gov/shutdown
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The National Geologic Map Database Project (NGMDB) is a collaborative effort primarily involving the
USGS and the Association of American State Geologists (AASG). This Web page contains information
regarding the development of methods and standards intended to address a fundamental requirement
of the NGMDB's authorizing legislation, the Geologic Mapping Act of 1992:
"Geologic maps contributed to the national archives [the NGMDB] should have standardized format, symbols, and technical attributes so that archival information can be assimilated, manipulated, accessed, exchanged, and compared efficiently and accurately."
Geologic Mapping Act of 1992, section 31f(b)
