Airborne geophysical surveys

Survey name Type Altitude Spacing Flight line distance
Portland 1992M-D152.4 m above ground0.40 km5,700 km
Scott MillsM-D304.8 m above ground0.53 km9,656 km
Longview NorthM-D304.8 m above ground0.80 km13,888 km
Hillsboro NorthwestM-D304.8 m above ground0.53 km482 km
Yamhill-TillamookM-D243.8 m above ground0.53 km7,203 km
VancouverM/R-D121.9 m 9.60 km2,341 km