{
    "identifier": "gov.noaa.ngdc.mgg.geophysics:G01443",
    "accessLevel": "public",
    "contactPoint": {
        "@type": "vcard:Contact",
        "fn": "Your contact point",
        "hasEmail": "mailto:[email protected]"
    },
    "programCode": [
        "010:000"
    ],
    "landingPage": "",
    "title": "U.S. Geoid Heights (GEOID96)",
    "description": "This 2' geoid height grid for the conterminous United States is the GEOID96 model. The computation used about 1.8 million terrestrial and marine gravity data held in the National Geodetic Survey gravity data base in July 1996. These data were augmented by gravity data contributions from NGA (former National Imagery and Mapping Agency (former Defence Mapping Agency)). By means of a Fast Fourier Transform (FFT) technique, high frequency corrections were made to an underlying EGM96 geopotential model through a remove, compute, and restore process. The gravity values are based on the International Gravity Standardization Net 1971 (IGSN71). The geoid heights are referred to the Geodetic Reference System 1980 (GRS80) ellipsoid. GEOID96 incorporates the reference system relationship between NAD 83(86) and ITRF94(1996.0), the datum offset of NAVD 88, and the contributions from 2951 GPS on leveled benchmarks. Additional information is available at http:\/\/www.ngs.noaa.gov\/GEOID\/geoid.htmlWe are particularly grateful to NGA (former National Imagery and Mapping Agency) for their assistance and their data contributions.",
    "language": "",
    "distribution": [
        {
            "@type": "dcat:Distribution",
            "mediaType": "application\/json",
            "accessURL": "https:\/\/www.ncei.noaa.gov\/metadata\/geoportal\/\/rest\/metadata\/item\/gov.noaa.ngdc.mgg.geophysics%3AG01443"
        },
        {
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            "mediaType": "text\/html",
            "accessURL": "https:\/\/www.ncei.noaa.gov\/metadata\/geoportal\/\/rest\/metadata\/item\/gov.noaa.ngdc.mgg.geophysics%3AG01443\/html"
        },
        {
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    ],
    "bureauCode": [
        "010:04"
    ],
    "modified": "2025-11-19T16:16:07.068Z",
    "publisher": {
        "@type": "org:Organization",
        "name": "Your Publisher"
    },
    "theme": "",
    "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",
        "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",
        "geoscientificInformation"
    ]
}