1. Mineral Resources
  2. Online Spatial Data
  3. Magnetic anomaly
  4. Aeromagnetic surveys
  5. Minnesota

Airborne geophysical surveys

Survey name Type Altitude Spacing Flight line distance
Grand ForksM/R-D121.9 m 9.60 km2,301 km
Central surveysM-D150 m above ground0.40 km55,000 km
Northwestern surveysM-D150 m above ground0.40 km44,500 km