Idaho-Montana (ID-MT)

Survey type M-Dz (magnetic; digitized from contour maps)
Flown by GeoMet.
Date flown 06/72-10/72
Line spacing 3.22 (km)
Altitude 3657.6 (m) by barometer measurement
Total distance 8,771 (km)
References
Counties Fremont - Lemhi - Beaverhead - Gallatin - Madison - Park - Park
Overlapping surveys

Data: Magnetic (M-Dz)