| Survey name | Type | Altitude | Spacing | Flight line distance |
|---|---|---|---|---|
| Bemidji | M/R-D | 121.9 m | 9.60 km | 2,248 km |
| Grand Forks | M/R-D | 121.9 m | 9.60 km | 2,301 km |
| Central surveys | M-D | 150 m above ground | 0.40 km | 55,000 km |
| Northwestern surveys | M-D | 150 m above ground | 0.40 km | 44,500 km |
| North-central surveys | M-D | 91 m above ground | 0.38 km | 60,000 km |
| Thief River Falls | M/R-D | 121.9 m | 9.60 km | 2,277 km |