Pennsylvania Coop (PA)

Survey type M-Dz (magnetic; digitized from contour maps)
Flown by USGS
Date flown 11/66
Line spacing 3.22 (km)
Altitude 914.4 (m) by barometer measurement
Total distance 4,828 (km)
References
Counties Berks - Carbon - Columbia - Cumberland - Dauphin - Juniata - Lackawanna - Lancaster - Lebanon - Lehigh - Luzerne - Lycoming - Monroe - Montour - Northampton - Northumberland - Perry - Schuylkill - Snyder - Sullivan - Susquehanna - Union - Wayne - Wyoming - York
Overlapping surveys

Data: Magnetic (M-Dz)