Mother Lode North (CA)

Survey type M-Dz (magnetic; digitized from contour maps)
Flown by U.S. Geological Survey
Date flown 09/67
Line spacing 0.8 (km)
Altitude 304.8 (m) above ground
Total distance 3,669 (km)
References
Counties Amador - Calaveras - El Dorado - San Joaquin
Overlapping surveys

Data: Magnetic (M-Dz)