Mineral Resources
Online Spatial Data
Magnetic anomaly
Aeromagnetic surveys
Minnesota
Airborne geophysical surveys
Survey name
Type
Altitude
Spacing
Flight line distance
Milbank
M/R-D
121.9 m
9.60 km
2,365 km
Swift
M-Dz
304.8 m above ground
1.60 km
14,162 km
West-central surveys
M-D
150 m above ground
0.40 km
82,000 km