Category Archives: Land Gravity Surveys

North Chukchi Sea Ice Survey (AK) [G1066]

Survey Size: Eight profiles, 517 gravity stations acquired by helicopter using inertial surveying; 512 stations on the North Chukchi Sea Ice, 5 stations on land Line Spacing: Data were acquired at 3-mile intervals along 8 profiles spaced 40 miles apart Survey Date: Spring 1986 Deliverable products include: Three-dimensional Bouguer correction applied Maps (scale 1:500,000): Station

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Southern Thrustbelt (NV, UT) [G1090]

Survey Size: 4,065 Helicopter Stations 4,215 Road Stations Data Spacing: 6,000ft – 7,000ft Helicopter ¼ mi – ½ mi Road Data Provided: CD/DVD containing all principal survey facts including: station number, date surveyed, latitude, longitude, UTM X-coordinate, UTM Y-coordinate, elevation, terrain correction, station gravity, free-air gravity and Bouguer gravity calculated for three densities Gravity data

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West Bighorn Basin (WY) [G1093]

Survey Size: 1,589 Helicopter Stations Data Spacing: 3,500ft Helicopter Data Provided: CD/DVD containing all principal survey facts including: station number, date surveyed, latitude, longitude, UTM X-coordinate, UTM Y-coordinate, elevation, terrain correction, station gravity, free-air gravity and Bouguer gravity calculated for three densities Gravity data are tied to the Worldwide Defense Mapping Agency base station gravity

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Survey E (WY) [G1092]

Survey Size: 903 Helicopter Stations 235 Road Stations Data Spacing: 5,280ft Helicopter ¼ mi Road Data Provided: CD/DVD containing all principal survey facts including: station number, date surveyed, latitude, longitude, UTM X-coordinate, UTM Y-coordinate, elevation, terrain correction, station gravity, free-air gravity and Bouguer gravity calculated for three densities Gravity data are tied to the Worldwide

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Spring Mountain (NV) [G1091]

Survey Size: 1,245 Helicopter Stations Data Spacing: 6,000ft Helicopter Data Provided: CD/DVD containing all principal survey facts including: station number, date surveyed, latitude, longitude, UTM X-coordinate, UTM Y-coordinate, elevation, terrain correction, station gravity, free-air gravity and Bouguer gravity calculated for three densities Gravity data are tied to the Worldwide Defense Mapping Agency base station gravity

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Snake River Downwarp (ID) [G1089]

Survey Size: 280 Road Stations Data Spacing: ¼ mi Road Data Provided: CD/DVD containing all principal survey facts including: station number, date surveyed, latitude, longitude, UTM X-coordinate, UTM Y-coordinate, elevation, terrain correction, station gravity, free-air gravity and Bouguer gravity calculated for three densities Gravity data are tied to the Worldwide Defense Mapping Agency base station

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Owyhee Basin (ID, NV) [G1088]

Survey Size: 1,700 Helicopter Stations 1,300 Road Stations Data Spacing: 7,000ft Helicopter grid; ½ mi Road Data Provided: CD/DVD containing all principal survey facts including: station number, date surveyed, latitude, longitude, UTM X-coordinate, UTM Y-coordinate, elevation, terrain correction, station gravity, free-air gravity and Bouguer gravity calculated for three densities Gravity data are tied to the

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Northern Thrustbelt (MT) [G1087]

Survey Size: 1,817 Helicopter Stations 1,327 Road Stations Data Spacing: 5,280ft – 6,500ft Helicopter ¼ mi Road Data Provided: CD/DVD containing all principal survey facts including: station number, date surveyed, latitude, longitude, UTM X-coordinate, UTM Y-coordinate, elevation, terrain correction, station gravity, free-air gravity and Bouguer gravity calculated for three densities Gravity data are tied to

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Mayfield (UT) [G1086]

Survey Size: 225 Helicopter Stations Data Spacing: 5,280ft Helicopter Data Provided: CD/DVD containing all principal survey facts including: station number, date surveyed, latitude, longitude, UTM X-coordinate, UTM Y-coordinate, elevation, terrain correction, station gravity, free-air gravity and Bouguer gravity calculated for three densities Gravity data are tied to the Worldwide Defense Mapping Agency base station gravity

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Jonah (WY) [G1085]

Survey Size: 120 Road Stations Data Spacing: 2,500ft Road Data Provided: CD/DVD containing all principal survey facts including: station number, date surveyed, latitude, longitude, UTM X-coordinate, UTM Y-coordinate, elevation, terrain correction, station gravity, free-air gravity and Bouguer gravity calculated for three densities Gravity data are tied to the Worldwide Defense Mapping Agency base station gravity

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Hoback (WY) [G1084]

Survey Size: 903 Helicopter Stations Data Spacing: ¼ mi Road Data Provided: CD/DVD containing all principal survey facts including: station number, date surveyed, latitude, longitude, UTM X-coordinate, UTM Y-coordinate, elevation, terrain correction, station gravity, free-air gravity and Bouguer gravity calculated for three densities Gravity data are tied to the Worldwide Defense Mapping Agency base station

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Elko County (NV) [G1081]

Survey Size: 1,190 Road Stations Data Spacing: ¼ mi Road Data Provided: CD/DVD containing all principal survey facts including: station number, date surveyed, latitude, longitude, UTM X-coordinate, UTM Y-coordinate, elevation, terrain correction, station gravity, free-air gravity and Bouguer gravity calculated for three densities Gravity data are tied to the Worldwide Defense Mapping Agency base station

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Central Thrustbelt (ID, UT, WY) [G1080]

Survey Size: 9,178 Helicopter Stations 12,065 Road Stations Data Spacing: 5,280ft – 6,900ft Helicopter ¼ mi Road Data Provided: CD/DVD containing all principal survey facts including: station number, date surveyed, latitude, longitude, UTM X-coordinate, UTM Y-coordinate, elevation, terrain correction, station gravity, free-air gravity and Bouguer gravity calculated for three densities. Gravity data are tied to

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Beartooth Mountains (MT, WY) [G1079]

Survey Size: 528 Helicopter Stations 624 Road Stations Data Spacing: 5,280ft Helicopter ¼ mi Road Data Provided: CD/DVD containing all principal survey facts including: station number, date surveyed, latitude, longitude, UTM X-coordinate, UTM Y-coordinate, elevation, terrain correction, station gravity, free-air gravity and Bouguer gravity calculated for three densities Gravity data are tied to the Worldwide

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Former Soviet Union [G1068]

Overview: EDCON has carefully and accurately digitized eighteen published aeromagnetic map sheets covering all of the Former Soviet Union. EDCON is offering an accurate alternative to the digital data set offered by NGDC Data Spacing: Grid Interval: 5,000 meters Interpretation: An interpretation of these data is being offered by Gibson Consulting Data Provided: Digital data

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Beaufort Sea Ice Survey [G1064]

Survey Size: 8 profiles, 386 gravity stations acquired by helicopter using inertial surveying; 352 stations on the Beaufort Sea ice, 34 stations on land Data Spacing: Data were acquired at 3-mile intervals along 8 profiles; spacing between profiles varies from 20 to 70 miles Complete Bouguer Corrections: Three-dimensional Bouguer correction applied Data Provided: Magnetic tape

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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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