Airborne geophysical surveys

Survey name Type Altitude Spacing Flight line distance
BaltimoreM/R-D121.9 m 4.80 km4,250 km
HarrisburgM/R-D121.9 m 4.80 km4,852 km
Harford CountyM-Dz152.4 m above ground0.80 km2,092 km
Baltimore GneissM-Dz152.4 m above ground0.80 km3,307 km
Northern MarylandM-Dz152.4 m above ground0.80 km2,719 km
Pennsylvania Triassic '57M-Dz152.4 m above ground0.40 km18,958 km
Pennsylvania CoopM-Dz914.4 m (barometer)3.20 km4,828 km
Pennsylvania-Maryland TieM-Dz152.4 m above ground0.80 km1,351 km
Central & Northern Penn.M-Dz304.8 m above ground4.80 km12,713 km