| Survey name | Type | Altitude | Spacing | Flight line distance |
|---|---|---|---|---|
| Elk River ARMS | M-A | 152.4 m above ground | 1.60 km | 16,093 km |
| East-central surveys | M-D | 150 m above ground | 0.40 km | 74,000 km |
| Central surveys | M-D | 150 m above ground | 0.40 km | 55,000 km |
| West-central surveys | M-D | 150 m above ground | 0.40 km | 82,000 km |
| St Cloud | M/R-D | 121.9 m | 4.80 km | 4,473 km |