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Mineral Resources On-Line Spatial Data

National Geochemical Survey


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NGS Database Documentation.

The primary NGS database has a relational structure, containing many component tables. For the purposes of this online data release, the database has been restructured as a large flat file containing 77212 rows (samples) and 284 columns (data fields). To facilitate downloading and distribution of these data, the data fields have been divided into 15 categories, which may be viewed in detail here. The major categories are: These categories are used to select entire families of data fields for inclusion in or exclusion from downloaded datasets. Documentation for all 284 of the individual fields may be found here.  Particularly important parts of this documentation may also be referenced below: 

U.S. Department of the Interior, U.S. Geological Survey
This page is part of U.S. Geological Survey Open-File Report 2004-1001
URL: http://mrdata.usgs.gov/geochem/doc/dbdoc.htm
Maintained by Jeff Grossman
Last modified: 09:05:08 Wed 14 Mar 2012
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