Airborne geophysical surveys

Survey name Type Altitude Spacing Flight line distance
BemidjiM/R-D121.9 m 9.60 km2,248 km
HibbingM/R-D121.9 m 9.60 km2,248 km
Effie-Coon LakeM-D91 m above ground0.40 km1,979 km
Northeastern surveysM-D150 m above ground0.40 km100,000 km
East-central surveysM-D150 m above ground0.40 km74,000 km
North-central surveysM-D91 m above ground0.38 km60,000 km