Plattsburgh (NY-VT)

Survey type M-Dz (magnetic; digitized from contour maps)
Flown by U.S. Geological Survey
Date flown 09/61
Line spacing 1.6 (km)
Altitude 304.8 to 609.6 (m) by barometer measurement
Total distance 506 (km)
References
Counties Clinton - Chittenden - Grand Isle
Overlapping surveys

Data: Magnetic (M-Dz)