Florence '56 (WI-MI)

Survey type M-Dz (magnetic; digitized from contour maps)
Flown by U.S. Geological Survey
Date flown 06/56-07/56
Line spacing 0.4 (km)
Altitude 152.4 (m) above ground
Total distance 3,942 (km)
References
Counties Dickinson - Iron - Florence - Forest - Marinette
Overlapping surveys

Data: Magnetic (M-Dz)