Survey Size: 2,400 square miles; 1,600 stations Data Spacing: ½ mile intervals on lines 3 miles apart, acquired using helicopter-supported inertial surveying Terrain Corrections: Through Hayford-Bowie Zone J Data Provided: Bouguer Gravity Map (scale 1:96,000): Gravity data are tied to the Worldwide Defense Mapping Agency base station gravity network. Magnetic tape and computer printout containing
Survey Size: 5,200 square miles, 250 stations Data Spacing: Variable, acquired using helicopter-supported inertial surveying Terrain Corrections: Through Hayford-Bowie Zone J Data Provided: Maps (scale 1:250,000): Bouguer Gravity Map. Gravity data are tied to the Worldwide Defense Mapping Agency base station gravity network. Magnetic tape and computer printout containing all principal survey facts including: station
Survey Size: Approximately 7,000 square miles; 1,609 helicopter stations from EDCON’s Bristol Bay Survey, 908 stations from the USGS gravity data base, 3,013 helicopter stations from the Strata Search survey. Data Spacing: Variable Terrain Corrections: Through Hayford-Bowie Zone J Project Summary: USGS stations have been terrain-corrected and integrated with the EDCON and Strata Search data.
Survey Size: 32,650 miles Flight Lines: East-West, ½- and 1-mile spacing Tie Lines: North-South, 5- and 10-mile spacing Elevation: 5,000 feet barometric Instrumentation: Geometrics G-803 magnetometer, 0.05 gamma Date Flown: August to November, 1984, and June to August, 1985 Data Provided: Total Magnetic Intensity (IRGF removed) contour map Flight Path Map Reduced-To-Pole of TMI map
Survey Size: 25,000 line miles (40,234 line km) Flight Lines: North-South, ½ – and ⅔-mile (0.8 and 1 km) spacing Tie Lines: East-West, 6-mile (9.7 km) spacing Elevation: 8,000, 9,000, and 11,000 feet (2.4, 2.7, and 3.4 km) barometric, draped over higher elevations Instrumentation: Geometrics G-813 magnetometer Date Flown: June to August, 1987 Data Provided:
