Airborne geophysical surveys

Survey name Type Altitude Spacing Flight line distance
Clearfield-PhilipsburgM-Dz304.8 m above ground0.80 km5,774 km
Central & Northern Penn.M-Dz304.8 m above ground4.80 km12,713 km
WarrenM/R-D121.9 m 9.60 km2,666 km
WilliamsportM/R-D121.9 m 4.80 km4,828 km