Tag Archives: Gravity

NPRA Survey [G1062]

Survey Size: 5,000 square miles; approximately 4,000 stations acquired by helicopter with inertial surveying; approximately 10,000 stations (public data) Data Spacing: 5,900 foot grid Terrain Corrections: Through Hayford-Bowie Zone J Data Provided: Magnetic tape and computer printout containing all principal survey facts including: station number, date surveyed, latitude, longitude, UTM X-coordinate, UTM Y-coordinate, elevation, terrain […]

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Holtina Basin Survey [G1061]

Survey Size: 1,150 stations acquired using inertial surveying Data Spacing: Data were acquired at one-mile intervals along lines spaced six miles apart Terrain Corrections: Through Hayford-Bowie Zone J Data Provided: Magnetic tape and computer printout containing all principal survey facts including: station number, date surveyed, latitude, longitude, UTM X-coordinate, UTM Y-coordinate, elevation, terrain correction, station […]

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Bristol Bay Survey [G1060]

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 […]

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Aluetian Islands Survey [G1059]

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 […]

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Alaska Peninsula Survey [G1058]

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. […]

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