Idaho Regional '69 (ID)

Survey type M-Dz (magnetic; digitized from contour maps)
Flown by USGS
Date flown 06/69-07/69
Line spacing 8.05 (km)
Altitude 3657.6 (m) by barometer measurement
Total distance 7,773 (km)
References
Counties Ada - Bannock - Bingham - Blaine - Boise - Bonneville - Butte - Camas - Canyon - Caribou - Cassia - Clark - Custer - Elmore - Fremont - Gem - Gooding - Jefferson - Jerome - Lemhi - Lincoln - Madison - Minidoka - Oneida - Owyhee - Payette - Power - Teton - Twin Falls - Valley - Washington - Beaverhead - Gallatin - Madison - Elko - Malheur - Box Elder - Lincoln - Teton
Overlapping surveys

Data: Magnetic (M-Dz)