http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
4th ed., Mar. 22, 2003 (Correct through NM 12/03).
prepared and published by the National Imagery and Mapping Agency.
"Copyright 2000 by the United States Government. No copyright claimed under Title 17 U.S.C."
Includes source diagram and tidal information.