| Survey type |
M-A (magnetic; derived from analog data) |
| Flown by |
Aero Service Corporation |
| Date flown |
?/70 |
| Line spacing |
1.6 (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 |
|
