Survey number: 3005H (Pat Hill number)
Name: Hogatza Trend
Date flown: 1968
Company: LKB
Flight specs: 1 mile, E-W, 400 ft above ground
Instrument: ?

Digitized by: DIGIMAP (Esther Castellanos) 1997
Map scale: 63,360 (20, 100, 500 nT contour intervals)

Datum: Arbitrary (No regional gradient removed)
       Estimated total intensity of field 55,500 nT

Publication: USGS Open-file report 69-170

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.