Airborne geophysical surveys

Survey name Type Altitude Spacing Flight line distance
MartinM/R-D121.9 m 9.60 km2,433 km
PierreM/R-D121.9 m 9.60 km2,565 km
S. South DakotaM-Dz1311 m (barometer)1.60 km28,689 km