West-central Oregon (OR)

Survey type M-D (magnetic; collected in digital form)
Flown by Diversified Technical Services, Inc.
Date flown 02/83-04/83
Line spacing 4.8 (km)
Altitude 1830 (m) by barometer measurement
Total distance 1,979 (km)
References
Counties Clackamas - Douglas - Lane - Linn - Marion
Overlapping surveys

Data: Magnetic (M-D)