Texas Coastal Plain '56 (TX)

Survey type M-Dz (magnetic; digitized from contour maps)
Flown by U.S. Geological Survey
Date flown 04/56-06/56
Line spacing 1.6 (km)
Altitude 152.4 (m) above ground
Total distance 20,317 (km)
References
Counties Atascosa - Bandera - Bee - Bexar - Blanco - Comal - DeWitt - Duval - Frio - Goliad - Gonzales - Guadalupe - Hays - Jim Wells - Karnes - Kendall - La Salle - Live Oak - McMullen - Medina - Uvalde - Victoria - Wilson - Zavala
Overlapping surveys

Data: Magnetic, radiometric (M/R-Dz)