N. Great Valley South (CA)

Survey type M-Dz (magnetic; digitized from contour maps)
Flown by Fairchild Aerial Surveys, Inc.
Date flown 10/51-03/52
Line spacing 1.6 (km)
Altitude 762 (m) by barometer measurement
Total distance 9,253 (km)
References
Counties Amador - Butte - Calaveras - Colusa - Contra Costa - Glenn - Placer - Sacramento - San Joaquin - Solano - Stanislaus - Sutter - Yolo - Yuba
Overlapping surveys

Data: Magnetic (M-Dz)