| Survey name | Type | Altitude | Spacing | Flight line distance |
|---|---|---|---|---|
| Bemidji | M/R-D | 121.9 m | 9.60 km | 2,248 km |
| Brainerd | M/R-D | 121.9 m | 9.60 km | 2,282 km |
| Duluth | M/R-D | 121.9 m | 9.60 km | 2,259 km |
| Hibbing | M/R-D | 121.9 m | 9.60 km | 2,248 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 |