Southwest Piedmont (VA)

Survey type M-Dz (magnetic; digitized from contour maps)
Flown by Aero
Date flown 06/65
Line spacing 0.8 (km)
Altitude 152.4 (m) above ground
Total distance 5,794 (km)
References
Counties Alleghany - Ashe - Rockingham - Stokes - Surry - Johnson - Carroll - Floyd - Franklin - Grayson - Henry - Montgomery - Patrick - Pulaski - Smyth - Washington - Wythe - Galax - Martinsville
Overlapping surveys

Data: Magnetic, radiometric (M/R-Dz)