Airborne geophysical surveys

Survey name Type Altitude Spacing Flight line distance
Big Sioux AquiferM/EM-D38 m above ground0.20 km910 km
Northwest IowaM-A304.8 m above ground1.60 km19,199 km
Minnesota Coop SouthwestM-Dz304.8 m above ground1.60 km16,173 km
Sioux FallsM/R-D121.9 m 9.60 km2,380 km