Airborne geophysical surveys

Survey name Type Altitude Spacing Flight line distance
Washington-Idaho-MontanaM-Dz2133.6 m (barometer)3.22 km8,441 km
SandpointM/R-D121.92 m 1.61 km9,994 km
SpokaneM/R-D121.92 m 1.61 km6,188 km
Northeast Washington '73M-D2133.6 m (barometer)1.61 km8,143 km