Manson (Blanden) (IA)

Survey type M-A (magnetic; derived from analog data)
Flown by USGS
Date flown 09/53
Line spacing 1.61 and 3.22 (km)
Altitude 304.8 (m) above ground
Total distance 1,770 (km)
References
Counties Adair - Adams - Audubon - Boone - Buena Vista - Butler - Calhoun - Carroll - Cass - Cerro Gordo - Crawford - Dallas - Floyd - Franklin - Fremont - Greene - Grundy - Guthrie - Hamilton - Hancock - Hardin - Harrison - Humboldt - Jasper - Kossuth - Madison - Marshall - Mills - Mitchell - Montgomery - Page - Pocahontas - Polk - Pottawattamie - Sac - Shelby - Story - Webster - Winnebago - Worth - Wright - Freeborn - Mower - Atchison - Cass - Douglas - Nemaha - Otoe - Sarpy - Washington
Overlapping surveys

Data: Magnetic (M-A)