Survey number: 3020 (Pat Hill number)
Name: SE Alaska (Granite Fiords)
Date flown: 8/72 - 9/72
Company: Aero Service
Flight specs: 1 mile, NE-SW, 6000 ft barometric.
Instrument: ?

Digitized by: Esther Castellanos, 8/96
Map scale: 1:63,360 

Datum: IGRF65? 

Publication: USGS Open-file report 77-359

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.