Survey number: 3092 (Pat Hill number)
Name: Ketchikan
Date flown: 5/76 - 7/76
Company: LKB Resources, Inc. (Huntingdon Valley, PA)
Flight specs: 1 mile, NE-SW, 6000 ft barometric.
Instrument: ?

Digitized by: Esther Castellanos, DIGIMAP, 3/97
Map scale: 1:63,360 

Datum: Arbitrary datum, regional field removed (IGRF 1965 updated to 1976) 

Publication: U.S. Geological Survey Open-file report 79-937 (19 sheets)

Data format: Ascii format, XYZ records 
             Longitude (degrees), Latitude (degrees), Total Field (nT)
             written with FORTRAN format: (f10.5,x,f10.5,x,f8.1)

Background: These data were digitized under the direction of Rick Saltus 
            (saltus@usgs.gov) as part of the USGS project to merge the best 
            available aeromagnetic data into a consistent grid for the state 
            of Alaska.