Airborne geophysical surveys

Survey name Type Altitude Spacing Flight line distance
MartinM/R-D121.92 m 9.66 km2,433 km
S. South DakotaM-Dz1310.64 m (barometer)1.61 km28,690 km
ValentineM/R-D121.92 m 9.66 km2,638 km