Northwest San Antonio (TX)

Survey type M-Dz (magnetic; digitized from contour maps)
Flown by Aero Service Corporation
Date flown ?/67-?/68
Line spacing 2 (km)
Altitude 853.4 (m) by barometer measurement
Total distance 13,703 (km)
References
Counties Atascosa - Bandera - Bexar - Blanco - Comal - Edwards - Frio - Gillespie - Kendall - Kerr - Kinney - Maverick - Medina - Real - Uvalde - Zavala
Overlapping surveys

Data: Magnetic (M-Dz)