| Survey name | Type | Altitude | Spacing | Flight line distance |
|---|---|---|---|---|
| Ashland | M/R-D | 121.9 m | 4.80 km | 3,162 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 |
| International Falls | M/R-D | 121.9 m | 9.60 km | 1,089 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 |
| North-central surveys | M-D | 91 m above ground | 0.38 km | 60,000 km |
| Quetico | M/R-D | 121.9 m | 9.60 km | 297 km |
| Two Harbors | M/R-D | 121.9 m | 9.60 km | 1,364 km |
| Northwest Wisconsin | M-D | 91 m above ground | 0.80 km | 6,316 km |