Pioneer (ID)

Survey type M-Dz (magnetic; digitized from contour maps)
Flown by Aerial
Date flown 03/74-04/74
Line spacing 1.61 (km)
Altitude 3657.6 (m) by barometer measurement
Total distance 1,561 (km)
References
Counties Blaine - Butte - Custer
Overlapping surveys

Data: Magnetic (M-Dz)