Maryland Coop '71 (MD)

Survey type M-Dz (magnetic; digitized from contour maps)
Flown by USGS
Date flown 03/71-04/71
Line spacing 1.61 (km)
Altitude 365.76 (m) by barometer measurement
Total distance 4,566 (km)
References
Counties Kent - Sussex - Anne Arundel - Calvert - Caroline - Dorchester - Kent - Queen Anne's - Saint Mary's - Somerset - Talbot - Wicomico - Worcester
Overlapping surveys

Data: Magnetic (M-Dz)