Survey name | Type | Altitude | Spacing | Flight line distance |
---|---|---|---|---|
Baltimore | M/R-D | 121.9 m | 4.80 km | 4,250 km |
Harrisburg | M/R-D | 121.9 m | 4.80 km | 4,852 km |
Harford County | M-Dz | 152.4 m above ground | 0.80 km | 2,092 km |
Baltimore Gneiss | M-Dz | 152.4 m above ground | 0.80 km | 3,307 km |
Northern Maryland | M-Dz | 152.4 m above ground | 0.80 km | 2,719 km |
Pennsylvania Triassic '57 | M-Dz | 152.4 m above ground | 0.40 km | 18,958 km |
Pennsylvania Coop | M-Dz | 914.4 m (barometer) | 3.20 km | 4,828 km |
Pennsylvania-Maryland Tie | M-Dz | 152.4 m above ground | 0.80 km | 1,351 km |
Central & Northern Penn. | M-Dz | 304.8 m above ground | 4.80 km | 12,713 km |