Airborne geophysical surveys

Survey name Type Altitude Spacing Flight line distance
RoanokeM/R-D121.92 m 9.66 km2,784 km
Roanoke Quad.M-Dz152.4 m above ground0.80 km11,265 km
Piedmont AreasM-Dz152.4 m above ground0.80 km10,783 km
S.-cent. Piedmont Rad (R5)M/R-D152.4 m above ground0.80 km4,506 km