1x2(3) Degree Quadrangle Grid Compilations on an FTP Site
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- Sherbrooke/Lewiston,
New Hampshire Magnetic Anomaly Grid at flight altitude of 1000 feet above ground
U.S. Geological Survey Open-File Report 85-0501 - Paducah,
Missouri, Illinois, and Kentucky Magnetic Anomaly Grid at flight altitude of 1000 feet above ground
U.S. Geological Survey Miscellaneous Field Studies Map MF-2131 - Aeromagnetic, gravity anomaly, and derivative maps of the Craig and Dixon Entrance 1-degree by 3-degree
quadrangles of Southeastern Alaska
U.S. Geological Survey Digital Data Series DDS-0056, one CD-ROM, 1999