Alaska Regional (AK)

Survey type M-Dz (magnetic; digitized from contour maps)
Flown by USGS
Date flown 07/65
Line spacing 16.09 and 12.43 (km)
Altitude 1524 (m) by barometer measurement
Total distance 14,484 (km)
References
Counties Denali - Fairbanks North Star - North Slope - Southeast Fairbanks - Yukon-Koyukuk
Overlapping surveys

Data: Magnetic (M-Dz)