N.G.V. - Wilbur Springs (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 1524 (m) by barometer measurement
Total distance 1,287 (km)
References
Counties Colusa - Lake - Napa - Yolo
Overlapping surveys

Data: Magnetic (M-Dz)