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Metadata Identifier: gov.noaa.ngdc.mgg.geophysics:G01333

Aggregation Info | Bands | Citations | Constraints | Coverage Descriptions | Dimensions | Extents | Formats | Geographic Bounding Box
Georectified Information | Georeferenceable Information | Identifiers | Instruments | Mediums | OnlineResources | Operations
Platforms | Process Steps | Range Elements | Reference Systems | Responsible Parties | Series | Sources | Spatial Grids | Temporal Extents

MD_DataIdentification

Count Component Title Abstract
1 Measured and Estimated Seafloor Topography - Poster This 34 by 53 inch full-color poster is report WDC for MGG RP-1. In many areas of the global ocean, the depth of the seafloor is not well known because survey lines by ships are hundreds of kilometers apart. Satellites carrying radar altimeters have measured the shape of the ocean along tracks only 3-4 km apart, and from these data we can make very accuratore (+/-3mGal) and high resolution (15km) maps of the marine gravity field. The gravity field mimics the seafloor topography in the 15-160 km wavelength band if sediment cover on the ocean floor is thin. Long-wavelength (greater than 160 km) topography is isostatically compensated and is not correlated with the gravity field. In addition, the satellite gravity field and the available depth measurements were used to determine the correlation between gravity and the seafloor topography. By applying this correlation to the gravity field we predict seafloor topography in the 15-160 km wavelength band. This topography is combined with a long-wavelength component estimated directly from ship depth measurements. The result reveals many new features and is within +/- 100m of actual depths in many cases. The Predicted Seafloor Topography derived from the depths estimated from Satellite Altimetry in combination with measured trackline bathymetry is an inferred data set and is not true bathymetry. It is, however, the best estimate of seafloor topography available resulting from satellite gravity data and actual ship depth measurements. These data are intended for scientific research and should not be used for navigational purposes. Additional software is required in order to manipulate the data or produce your own graphic images. Poster and CD-ROM products are available for both gravity anomaly and estimated seafloor topography of several regions. Please refer to URL http://www.ngdc.noaa.gov/mgg/fliers/97mgg03.html more information, and to download sample images.
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SV_Identification

none found
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CI_Citation

Count Component Title Date Citation Identifier
1 Measured and Estimated Seafloor Topography - Poster
    1994-01-01
1 Uncontrolled Keywords
    Unresolved Xlinks
    NASA/GCMD Science Keywords at: /gmi:MI_Metadata/gmd:identificationInfo[1]/gmd:MD_DataIdentification[1]/gmd:descriptiveKeywords[1]/gmd:MD_Keywords[1]/gmd:thesaurusName[1]
    GCMD Location Keywords at: /gmi:MI_Metadata/gmd:identificationInfo[1]/gmd:MD_DataIdentification[1]/gmd:descriptiveKeywords[4]/gmd:MD_Keywords[1]/gmd:thesaurusName[1]
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    CI_Series

    Count Component Name Issue Identification Page
    1 Marine Geology and Geophysics (MGG) Measured and Estimated Seafloor Topography, WDC for MGG RP-1
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    CI_ResponsibleParty

    Count Component Individual Organization Position Email Role Linkage
    2 Brian Meyer Brian Meyer DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce Brian.Meyer@noaa.gov pointOfContact
    2 NCEI (publisher) DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce publisher
    1 User Services (originator) DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce User Services ngdc.info@noaa.gov originator
    1 User Services DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce User Services ngdc.info@noaa.gov distributor
    Unresolved Xlinks
    Robin Warnken at: /gmi:MI_Metadata/gmd:identificationInfo[1]/gmd:MD_DataIdentification[1]/gmd:pointOfContact[1]
    Anna Milan at: /gmi:MI_Metadata/gmd:metadataMaintenance[1]/gmd:MD_MaintenanceInformation[1]/gmd:contact[1]
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    CI_OnlineResource

    Count Component Linkage Name Description Function
    1 http://ols.nndc.noaa.gov/plolstore/plsql/olstore.prodspecific?prodnum=G01333-POS-A0001
    1 http://www.ngdc.noaa.gov/mgg/fliers/97mgg03.html
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    MD_Identifier or RS_Identifier

    Count Component Code
    1 Radar Altimeters
    1 Satellites
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    EX_Extent

    Bounding Box Temporal Extent
    Count Component Description West East North South Start End
    1 -180.000000 180.000000 72.000000 -72.000000 1978-07-01 1978-10-30
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    EX_GeographicBoundingBox

    Count Component West East North South
    1 -180.000000 180.000000 72.000000 -72.000000
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    EX_TemporalExtent

    Count Component Start End
    1 1978-07-01 1978-10-30
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    MD_Format

    Count Component Name Version specification
    1 Poster N/A
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    MD_Medium

    none found
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    MD_Constraints

    Count Component Use Limitation
    Unresolved Xlinks
    NOAA Disclaimer at: /gmi:MI_Metadata/gmd:identificationInfo[1]/gmd:MD_DataIdentification[1]/gmd:resourceConstraints[1]
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    MD_ReferenceSystem

    none found
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    MD_GridSpatialRepresentation

    none found
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    MD_Georeferenceable or MI_Georeferenceable

    none found
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    MD_Georectified or MI_Georectified

    none found
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    MD_Dimension

    none found
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    MD_CoverageDescription or MI_CoverageDescription

    none found
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    MD_Band or MI_Band

    none found
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    MI_RangeElementDescription

    none found
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    MD_AggregateInformation

    none found
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    LE_Source or LI_Source

    none found
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    LE_ProcessStep or LI_ProcessStep

    none found
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    MI_Operation

    none found
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    MI_Platform

    Count Component Code Description
    1 Satellites
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    MI_Instrument

    Count Component Code Type Description
    1 Radar Altimeters
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