Airborne geophysical surveys

Survey name Type Altitude Spacing Flight line distance
LewistonM/R-D121.92 m 9.66 km2,494 km
North-central N.H. '66M-Dz1676.4 m (barometer)0.80 km2,897 km
North-central N.H. '68M-Dz1524 m (barometer)0.80 km2,503 km
Central New Hampshire '68M-Dz1524 m (barometer)0.80 km1,561 km
Central New HampshireM-Dz914.4 m (barometer)0.80 km5,132 km
PortlandM/R-D121.92 m 8.05 km990 km