Alaska1(ak1_iso) Gravity Data
The gravity station data (72,677 records) were compiled by the U.S. Geological Survey and the State of Alaska Division of Geological & Geophysical Surveys. This data base was received in February, 1993. Principal gravity parameters include Free-air anomalies, isostatic anomalies and Simple Bouguer anomalies (no terrain correction applied). The "iso" suffix indicates that a crustal thickness of 25 kilometers was used in the isostatic calculation. The observed gravity values are referenced to the International Gravity Standardization Net 1971 (IGSN 71). The gravity anomaly computation uses the Geodetic Reference System 1967 (GRS 67) theoretical gravity formula. Note that the original USGS Open File Report by D. F. Barnes mentions the use of the 1931 International Ellipsoid for gravity reduction but this is believed to have subsequently been changed to the GRS 67 system.
Complete Metadata
| @type | dcat:Dataset |
|---|---|
| accessLevel | non-public |
| contactPoint |
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"hasEmail": "mailto:brian.meyer@noaa.gov"
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|
| describedByType | application/octet-steam |
| description | The gravity station data (72,677 records) were compiled by the U.S. Geological Survey and the State of Alaska Division of Geological & Geophysical Surveys. This data base was received in February, 1993. Principal gravity parameters include Free-air anomalies, isostatic anomalies and Simple Bouguer anomalies (no terrain correction applied). The "iso" suffix indicates that a crustal thickness of 25 kilometers was used in the isostatic calculation. The observed gravity values are referenced to the International Gravity Standardization Net 1971 (IGSN 71). The gravity anomaly computation uses the Geodetic Reference System 1967 (GRS 67) theoretical gravity formula. Note that the original USGS Open File Report by D. F. Barnes mentions the use of the 1931 International Ellipsoid for gravity reduction but this is believed to have subsequently been changed to the GRS 67 system. |
| distribution |
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|
| identifier | gov.noaa.ngdc.mgg.geophysics:G01452 |
| issued | 1999-01-01T00:00:00.000+00:00 |
| keyword |
[
"EARTH SCIENCE>SOLID EARTH>Geodetics/Gravity>Control Surveys",
"EARTH SCIENCE>SOLID EARTH>Geodetics/Gravity>Gravitational Field",
"EARTH SCIENCE>SOLID EARTH>Geodetics/Gravity>Gravity",
"EARTH SCIENCE>SOLID EARTH>Geodetics/Gravity>Reference Systems",
"EARTH SCIENCE>SOLID EARTH>Geodetics/Gravity>Satellite Orbits",
"Absolute Gravity",
"Bouguer Gravity",
"Free Air Anomaly",
"Gridded Gravity",
"Land Gravity",
"Observed Gravity",
"ICSU-WDS > International Council for Science - World Data System",
"Continent>North America>United States of America>Alaska",
"DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce",
"DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce"
]
|
| language |
[]
|
| license | https://creativecommons.org/publicdomain/zero/1.0/ |
| modified | 1999-01-01T00:00:00.000+00:00 |
| publisher |
{
"name": "NOAA National Centers for Environmental Information",
"@type": "org:Organization"
}
|
| rights | otherRestrictions, otherRestrictions |
| spatial | -141.01,61.0,-167.908,71.389 |
| title | Alaska1(ak1_iso) Gravity Data |
