Airborne geophysical surveys

Survey name	Type	Altitude	Spacing	Flight line distance
Austin	M/R-D	121.9 m	4.80 km	3,991 km
Seguin	M/R-D	121.9 m	4.80 km	4,296 km
Lockhart	M-D	457.2 m (barometer)	9.60 km	619 km
Northeast San Antonio	M-Dz	548.6 m (barometer)	2.00 km	3,983 km