Airborne geophysical surveys

Survey name Type Altitude Spacing Flight line distance
BaltimoreM/R-D121.9 m 4.80 km4,250 km
Harford CountyM-Dz152.4 m above ground0.80 km2,092 km
Baltimore GneissM-Dz152.4 m above ground0.80 km3,307 km
Maryland Coop '68M-Dz121.9 m above ground0.80 km3,947 km
Pennsylvania-Maryland TieM-Dz152.4 m above ground0.80 km1,351 km