Massachusetts Coop '65 (MA-CT-RI)

Survey type M-Dz (magnetic; digitized from contour maps)
Flown by USGS
Date flown 04/65-05/65
Line spacing 1.61 (km)
Altitude 152.4 (m) above ground
Total distance 1,931 (km)
References
Counties Hartford - Tolland - Windham - Hampden - Hampshire - Worcester - Providence
Overlapping surveys

Data: Magnetic (M-Dz)