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  5. North Dakota

Airborne geophysical surveys

Survey name Type Altitude Spacing Flight line distance
DickinsonM/R-D121.92 m 4.83 km4,183 km
Northeast Mt.-Western N.D.M-D&Dz1219.2 m (barometer)4.83 km11,193 km
Watford CityM/R-D121.92 m 4.83 km2,923 km