Southeast Iowa (IA)

Survey type M-A (magnetic; derived from analog data)
Flown by Aero
Date flown ?/70
Line spacing 1.61 (km)
Altitude 304.8 (m) above ground
Total distance 14,886 (km)
References
Counties Henderson - Mercer - Rock Island - Adair - Adams - Appanoose - Cass - Cedar - Clarke - Dallas - Davis - Decatur - Des Moines - Guthrie - Henry - Iowa - Jasper - Jefferson - Johnson - Keokuk - Louisa - Lucas - Madison - Mahaska - Marion - Monroe - Montgomery - Muscatine - Page - Polk - Poweshiek - Ringgold - Scott - Taylor - Union - Van Buren - Wapello - Warren - Washington - Wayne
Overlapping surveys

Data: Magnetic (M-A)