Sierra Nevada '63 Central (CA)

Survey type M-Dz (magnetic; digitized from contour maps)
Flown by U.S. Geological Survey
Date flown 10/63
Line spacing 1.6 (km)
Altitude 2438 (m) by barometer measurement
Total distance 788 (km)
References
Counties Fresno - Madera
Overlapping surveys

Data: Magnetic (M-Dz)