SE Alaska (Granite Fiords) (AK)

Survey type M-Dz (magnetic; digitized from contour maps)
Flown by Aero Service Corporation
Date flown 08/72-09/72
Line spacing 1.6 (km)
Altitude 1830 (m) by barometer measurement
Total distance 2,735 (km)
References
Counties Ketchikan Gateway -
Overlapping surveys

Data: Magnetic (M-Dz)