Northern Maryland (MD-PA)

Survey type M-Dz (magnetic; digitized from contour maps)
Flown by LKB
Date flown 09/72-11/72
Line spacing 0.8 (km)
Altitude 152.4 (m) above ground
Total distance 2,720 (km)
References
Counties Carroll - Frederick - Washington - Adams - Franklin - York - Jefferson
Overlapping surveys

Data: Magnetic (M-Dz)