Winston-Salem (NC-TN)

Survey type M-Dz (magnetic; digitized from contour maps)
Flown by U.S. Geological Survey
Date flown 05/66
Line spacing 1.6 (km)
Altitude 609.6 to 1524 (m) by barometer measurement
Total distance 8,207 (km)
References
Counties Alexander - Alleghany - Ashe - Avery - Burke - Caldwell - Iredell - Watauga - Wilkes - Carter - Johnson - Sullivan - Grayson - Washington
Overlapping surveys

Data: Magnetic (M-Dz)