Modoc East (CA)

Survey type M-Dz (magnetic; digitized from contour maps)
Flown by Aero Service Corporation
Date flown ?/57
Line spacing 3.2 (km)
Altitude 2896 (m) by barometer measurement
Total distance 1,375 (km)
References
Counties Lassen - Modoc - Washoe - Lake
Overlapping surveys

Data: Magnetic (M-Dz)