Washington-Idaho-Montana (ID-MT-WA)

Survey type M-Dz (magnetic; digitized from contour maps)
Flown by Scintrex 
Date flown 07/72-09/72
Line spacing 3.2 (km)
Altitude 2134 (m) by barometer measurement
Total distance 8,441 (km)
References
Counties Benewah - Bonner - Boundary - Kootenai - Latah - Shoshone - Flathead - Lake - Lincoln - Mineral - Ferry - Pend Oreille - Spokane - Stevens - Whitman
Overlapping surveys

Data: Magnetic (M-Dz)