Medford '78 (OR)

Survey type M-Dz (magnetic; digitized from contour maps)
Flown by Aero Service Corporation
Date flown 06/78-07/78
Line spacing 1.6 (km)
Altitude 1372 (m) by barometer measurement
Total distance 5,978 (km)
References
Counties Del Norte - Siskiyou - Coos - Curry - Douglas - Jackson - Josephine
Overlapping surveys

Data: Magnetic (M-Dz)