Mineral Resources
Online Spatial Data
Magnetic anomaly
Aeromagnetic surveys
South Dakota
Airborne geophysical surveys
Survey name
Type
Altitude
Spacing
Flight line distance
Milbank
M/R-D
121.9 m
9.60 km
2,365 km
Watertown
M/R-D
121.9 m
9.60 km
2,381 km