| Survey name | Type | Altitude | Spacing | Flight line distance |
|---|---|---|---|---|
| North-central N.C. | M-D | 152.4 m above ground | 1.60 km | 10,029 km |
| Southwest Virginia | M-Dz | 1524 m (barometer) | 2.40 km | 4,828 km |
| Southwest Piedmont | M-Dz | 152.4 m above ground | 0.80 km | 5,793 km |
| Western Virginia | M-Dz | 152.4 m above ground | 0.80 km | 12,231 km |
| Winston Salem | M/R-D | 121.9 m | 4.80 km | 5,122 km |