Channel Name Contents Line Line number FID Fiducial LAT Latitude LON Longitude X X-coordinate (meters) in an Alaska Albers projection Y Y-coordinate (meters) in an Alaska Albers projection HEIGHT Elevation above ground (meters) if available FLTSURF Flight surface (meters above sea level) consistent with AKC FLTSURF_M Flight surface (meters above sea level) consistent with AKM MAG_RAW Raw magnetics (if available) MAG_BASE Basemag-corrected magnetics (if available) MAG_DGRF DGRF-corrected magnetics (if available) MAG_COMP Composite magnetic value (consistent with AKC) MAG_MERGE Merged magnetic value (consistent with AKM) USE_FLAG Used/not-used flag to signal use in AKCTwo additional channels were included in the database files for a few of the INTAK surveys:
MAG_IGRF IGRF-corrected magnetics where DGRF-corrected magnetic were not available MAG_DRAPE 1,000 ft. draped version of MAG_DGRF or MAG_IGRF
Aeromagnetic surveys are used for geophysical prospecting. Some variations in magnetic measurements are caused by rocks that contain significant amounts of magnetic minerals (magnetite being the most common). These anomalies reflect variations in the amount and type of magnetic material and the shape and depth of the body of rock. The features and patterns of aeromagnetic anomalies can also be used to delineate details of subsurface geology including the locations of buried faults and the thickness of surficial sedimentary rocks.
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|Data format:||Flight-line airborne magnetic anomaly measurements, collected in digital form in format CSV (version 1.0) Size: 1.6173706054688|