Airborne geophysical surveys

Survey name Type Altitude Spacing Flight line distance
ClevelandM/R-D121.9 m 9.60 km2,114 km
Northern Ohio EastM-D548.6 m (barometer)3.20 km7,330 km
Central & Northern Penn.M-Dz304.8 m above ground4.80 km12,713 km
WarrenM/R-D121.9 m 9.60 km2,666 km