Copper River '54 (AK)

Survey type M-Dz (magnetic; digitized from contour maps)
Flown by U.S. Geological Survey
Date flown 06/54
Line spacing 3.2 (km)
Altitude 1219 (m) by barometer measurement
Total distance 2,172 (km)
References
Counties Matanuska-Susitna - Valdez-Cordova
Overlapping surveys

Data: Magnetic (M-Dz)