Massachusetts Coop '63 (MA-CT-NY)

Survey type M-Dz (magnetic; digitized from contour maps)
Flown by USGS
Date flown 08/63
Line spacing 1.61 (km)
Altitude 152.4 (m) above ground
Total distance 1,143 (km)
References
Counties Hartford - Litchfield - Berkshire - Hampden - Hampshire - Columbia - Dutchess
Overlapping surveys

Data: Magnetic (M-Dz)