Airborne geophysical surveys

Survey name Type Altitude Spacing Flight line distance
EvansvilleM/R-D121.92 m 4.83 km3,867 km
Wabash ValleyM-D152.4 m above ground0.45 km6,116 km
Southeast Illinois '77M-D304.8 m above ground1.61 km12,231 km
Bluegrass Area, KY/Pauducah Area, KY/ Hopkinsville Area, KY & TN/ Owensboro Area, KY/ Paradise-Russellville Area, KY & TN/ Louisville, KY/ Burskville-Somerset Area, KY & TN/ Ashland-Hazard Area, KY/ Cincinnatis Area, KYM-D152.4 m above ground1.61 km67,633 km