Airborne geophysical surveys

Survey name Type Altitude Spacing Flight line distance
BluefieldM/R-D121.9 m 9.60 km2,784 km
Southwest VirginiaM-Dz1524 m (barometer)2.40 km4,828 km
Western VirginiaM-Dz152.4 m above ground0.80 km12,231 km
Winston SalemM/R-D121.9 m 4.80 km5,122 km
Southern West VirginiaM-Dz304.8 m above ground3.20 km6,804 km