San Francisco '73 (CA)

Survey type M-D (magnetic; collected in digital form)
Flown by Exploration Technology
Date flown 07/73-09/73
Line spacing 1.6 (km)
Altitude 914.4 (m) by barometer measurement
Total distance 11,909 (km)
References
Counties Alameda - Colusa - Contra Costa - Lake - Marin - Mendocino - Merced - Monterey - Napa - Sacramento - San Benito - San Francisco - San Joaquin - San Mateo - Santa Clara - Santa Cruz - Solano - Sonoma - Stanislaus - Yolo
Overlapping surveys

Data: Magnetic (M-D)