Pend Orielle North-central (ID-MT)

Survey type M-Dz (magnetic; digitized from contour maps)
Flown by USGS
Date flown 08/59
Line spacing 1.61 and 3.22 (km)
Altitude 1828.8 (m) by barometer measurement
Total distance 193 (km)
References
Counties Bonner - Kootenai - Shoshone - Lincoln - Sanders
Overlapping surveys

Data: Magnetic (M-Dz)