Colorado Regional West (CO)

Survey type M-A (magnetic; derived from analog data)
Flown by U.S. Geological Survey
Date flown 09/69-03/70
Line spacing 1.6 (km)
Altitude 4420 (m) by barometer measurement
Total distance 5,632 (km)
References
Counties Delta - Gunnison - Mesa - Montrose - Ouray - Saguache
Overlapping surveys

Data: Magnetic (M-A)