Airborne geophysical surveys

Survey name Type Altitude Spacing Flight line distance
BaltimoreM/R-D121.9 m 4.80 km4,250 km
CumberlandM/R-D121.9 m 9.60 km2,726 km
HarrisburgM/R-D121.9 m 4.80 km4,852 km
Maryland Coop '70M-Dz1067 m (barometer)1.60 km5,359 km
Central & Northern Penn.M-Dz304.8 m above ground4.80 km12,713 km
PittsburghM/R-D121.9 m 9.60 km2,697 km
Northern West VirginiaM-D304.8 m above ground3.20 km6,855 km