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