Airborne geophysical surveys

Survey name Type Altitude Spacing Flight line distance
BaltimoreM/R-D121.92 m 4.83 km4,250 km
CumberlandM/R-D121.92 m 9.66 km2,726 km
HarrisburgM/R-D121.92 m 4.83 km4,852 km
Maryland Coop '70M-Dz1066.8 m (barometer)1.61 km5,359 km
Northern MarylandM-Dz152.4 m above ground0.80 km2,720 km
Central & Northern Penn.M-Dz304.8 m above ground4.83 km12,714 km