Airborne geophysical surveys

Survey name Type Altitude Spacing Flight line distance
RollaM-D548.64 m (barometer)0.80 km10,219 km
Gerald QuadrangleM-Dz152.4 m above ground0.40 km1,609 km
Linn-Augusta AreaM-Dz457.2 m (barometer)0.40 km17,703 km
North Missouri Ground MagM-DzGround m at ground level1.61 km km
St LouisM/R-D121.92 m 9.66 km2,807 km