| Survey name | Type | Altitude | Spacing | Flight line distance |
|---|---|---|---|---|
| Centerville | M/R-D | 121.9 m | 9.60 km | 2,697 km |
| Southeast Iowa | M-A | 304.8 m above ground | 1.60 km | 14,886 km |
| Southern Iowa | M-A | 609.6 m (barometer) | 1.60 km | 8,545 km |
| North Missouri Ground Mag | M-Dz | -9999 m at ground level | 1.60 km | km |