Survey numbers: AK08, AK11, AK12, AK13  
Name: State of Alaska Interior Alaska Surveys
Dates flown: 1971 - 1973
Company: LKB Resources
Flight specs: 0.75 mile, N-S, 1000 ft above ground.
Instrument: ?

Digitized by: Esther Castellanos, Digimap, under contract to USGS
Map scale: 1:63,360 

Datum: IGRF65 (planar approximation)

Publication: State of Alaska Open File Maps (out of print)

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)