Montana '79 (MT)

Survey type M-Dz (magnetic; digitized from contour maps)
Flown by USGS
Date flown 08/79
Line spacing 0.8 and 1.61 (km)
Altitude 2438.4 (m) by barometer measurement
Total distance 1,287 (km)
References
Counties Lake - Missoula
Overlapping surveys

Data: Magnetic (M-Dz)