Central New Hampshire (NH-ME)

Survey type M-Dz (magnetic; digitized from contour maps)
Flown by Aero
Date flown 06/76-10/76
Line spacing 0.8 (km)
Altitude 914.4 (m) by barometer measurement
Total distance 5,132 (km)
References
Counties Oxford - York - Belknap - Carroll - Grafton - Merrimack - Rockingham - Strafford
Overlapping surveys

Data: Magnetic (M-Dz)