Tombstone (AZ)

Survey type M-Dz (magnetic; digitized from contour maps)
Flown by U.S. Geological Survey
Date flown 01/64
Line spacing 1.6 (km)
Altitude 2743 (m) by barometer measurement
Total distance 5,597 (km)
References
Counties Cochise - Pima - Santa Cruz
Overlapping surveys

Data: Magnetic (M-Dz)