| Survey name | Type | Altitude | Spacing | Flight line distance |
|---|---|---|---|---|
| Duluth | M/R-D | 121.9 m | 9.60 km | 2,259 km |
| Elk River ARMS | M-A | 152.4 m above ground | 1.60 km | 16,093 km |
| Pine | M-A | 304.8 m above ground | 1.60 km | 692 km |
| Northeastern surveys | M-D | 150 m above ground | 0.40 km | 100,000 km |
| East-central surveys | M-D | 150 m above ground | 0.40 km | 74,000 km |
| Stillwater | M/R-D | 121.9 m | 9.60 km | 2,315 km |