Shenandoah Valley Dikes (VA)

Survey type M-Dz (magnetic; digitized from contour maps)
Flown by USGS
Date flown 04/53-06/53
Line spacing 0.8 (km)
Altitude 640.08 (m) by barometer measurement
Total distance 1,827 (km)
References
Counties Augusta - Rockingham - Harrisonburg - Staunton - Waynesboro
Overlapping surveys

Data: Magnetic (M-Dz)