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USGS National Geologic Map Database Collection

Metadata Updated: January 5, 2021

The National Geologic Map Database (NGMDB) is a Congressionally mandated national archive of geoscience maps, reports, and stratigraphic information. According to the Geologic Mapping Act, the U.S. Geological Survey and the Association of American State Geologists (AASG) shall cooperatively build this national archive, according to technical and scientific standards whose development is coordinated by the NGMDB. At present, the NGMDB consists of a comprehensive set of publication citations, stratigraphic nomenclature, downloadable content, unpublished source information, and guidance on standards development. The NGMDB contains information on more than 90,000 maps and related geoscience reports published from the early 1800s to the present day, by more than 630 agencies, universities, associations, and private companies.

Access & Use Information

License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.


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Metadata Date April 28, 2015
Metadata Created Date January 5, 2021
Metadata Updated Date January 5, 2021
Reference Date(s) January 1, 2012 (publication)
Frequency Of Update continual

Metadata Source

Harvested from USGS National Geologic Map Database

Graphic Preview

Browse graphic

Additional Metadata

Resource Type Dataset
Metadata Date April 28, 2015
Metadata Created Date January 5, 2021
Metadata Updated Date January 5, 2021
Reference Date(s) January 1, 2012 (publication)
Responsible Party U.S. Geological Survey (Point of Contact)
Contact Email
Access Constraints Use Constraints: None. Acknowledgement of the originating agencies would be appreciated in products derived from these data. Any user who modifies the data is obligated to describe the types of modifications they perform. User specifically agrees not to misrepresent the data, nor to imply that changes made were approved or endorsed by the U.S. Geological Survey., Access Constraints: none
Bbox East Long -65.0000
Bbox North Lat 74.0000
Bbox South Lat 23.0000
Bbox West Long -179.0000
Collection Metadata true
Coupled Resource
Frequency Of Update continual
Graphic Preview Description Browse graphic
Graphic Preview File
Graphic Preview Type jpg
Harvest Object Id 02b04694-e574-4f67-92f3-208d36242c2b
Harvest Source Id edbcef00-f353-45cc-b4ae-8ec9f57534d2
Harvest Source Title USGS National Geologic Map Database
Licence Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.
Metadata Language eng; USA
Metadata Type geospatial
Old Spatial {"type": "Polygon", "coordinates": [[[-179.0, 23.0], [-65.0, 23.0], [-65.0, 74.0], [-179.0, 74.0], [-179.0, 23.0]]]}
Progress underDevelopment
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True

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