Northern New Hampshire '66 (NH-VT)

Survey type M-A (magnetic; derived from analog data)
Flown by USGS
Date flown 06/66
Line spacing 0.8 (km)
Altitude 1066.8 (m) by barometer measurement
Total distance 4,506 (km)
References
Counties Oxford - Coos
Overlapping surveys

Data: Magnetic (M-A)