| Survey name | Type | Altitude | Spacing | Flight line distance |
|---|---|---|---|---|
| Winston-Salem | M-Dz | 609.6 m (barometer) | 1.60 km | 8,207 km |
| North-central N.C. | M-D | 152.4 m above ground | 1.60 km | 10,029 km |
| Southwest Piedmont | M-Dz | 152.4 m above ground | 0.80 km | 5,793 km |
| Winston Salem | M/R-D | 121.9 m | 4.80 km | 5,122 km |