North Cascades Nat. Park (WA)

Survey type M-D (magnetic; collected in digital form)
Flown by Diversified Technical Services, Inc.
Date flown 04/83
Line spacing 4.8 (km)
Altitude 2743 (m) by barometer measurement
Total distance 812 (km)
References
Counties Chelan - Okanogan - Skagit - Whatcom
Overlapping surveys

Data: Magnetic (M-D)