North Park-Central City 67 (CO)

Survey type M-A (magnetic; derived from analog data)
Flown by U.S. Geological Survey
Date flown 07/67
Line spacing 1.6 (km)
Altitude 4267 (m) by barometer measurement
Total distance 7,475 (km)
References
Counties Boulder - Broomfield - Clear Creek - Eagle - Gilpin - Grand - Jefferson - Park - Routt - Summit
Overlapping surveys

Data: Magnetic (M-A)