Pittsburgh ARMS (PA-MD-OH-WV)

Survey type M-Dz (magnetic; digitized from contour maps)
Flown by USGS
Date flown 06/60-09/60
Line spacing 1.61 (km)
Altitude 152.4 (m) above ground
Total distance 24,140 (km)
References
Counties Allegany - Garrett - Belmont - Carroll - Columbiana - Geauga - Guernsey - Harrison - Jefferson - Mahoning - Monroe - Noble - Portage - Stark - Trumbull - Tuscarawas - Allegheny - Armstrong - Beaver - Butler - Cambria - Clarion - Fayette - Forest - Greene - Indiana - Jefferson - Lawrence - Mercer - Somerset - Venango - Washington - Westmoreland - Brooke - Hancock - Marshall - Monongalia - Ohio - Preston - Wetzel
Overlapping surveys

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