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Metadata Identifier: gov.noaa.ngdc.mgg.geophysics:G01471

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 Gravity Data for Southwestern Alaska #2 The gravity station data (1294 records) were compiled by the Alaska Geological Survey and the U.S. Geological Survey, Menlo Park, California. This data base was received in September 1986. Principal gravity parameters include Free-air Anomalies and Simple Bouguer Anomalies (no terrain correction applied) and altimeter elevations to compute the anomalies. 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. The data are randomly distributed within the boundaries of central Alaska.
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SV_Identification

none found
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CI_Citation

Count Component Title Date Citation Identifier
1 Entity and Attribute Information
    1 Getty Thesaurus of Geographic Names Getty Thesaurus of Geographic Names
      2011-04-11
    1 Gravity Data for Southwestern Alaska

    1 Gravity Data for Southwestern Alaska #2
      1999-01-01
    1 GCMD Data Center Keywords NASA/GCMD Data Center Keywords
      2015-03-01
      1995-04-24
    1 NASA/GCMD Science Keywords NASA/Global Change Master Directory (GCMD) Earth Science Keywords
      2007-04
    1 Uncontrolled Keywords
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      CI_Series

      none found
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      CI_ResponsibleParty

      Count Component Individual Organization Position Email Role Linkage
      1 User Services (publisher) publisher
      1 User Services (originator) originator
      1 Anna Milan Anna Milan DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce Metadata Specialist Anna.Milan@noaa.gov pointOfContact
      1 Getty Research Institute TGN@getty.edu custodian http://www.getty.edu/research/tools/vocabularies/tgn/index.html
      1 GCMD User Support Office NASA GCMD User Support Office gcmduso@gcmd.gsfc.nasa.gov publisher http://gcmd.nasa.gov/MailComments/MailComments.jsf?rcpt=gcmduso
      1 NASA/GSFC/SED/ESD/GCDC/GCMD > Global Change Master Directory, Global Change Data Center, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA resourceProvider http://gcmd.gsfc.nasa.gov/Resources/valids/archives/keyword_list.html
      1 State of Alaska originator
      1 Susan Mclean Susan McLean DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce Susan.McLean@noaa.gov pointOfContact
      1 Susan Mclean (processor) Susan McLean DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce Susan.McLean@noaa.gov processor
      Unresolved Xlinks
      Brian Meyer at: /gmi:MI_Metadata/gmd:contact[1]
      NCEI (publisher) at: /gmi:MI_Metadata/gmd:identificationInfo[1]/gmd:MD_DataIdentification[1]/gmd:citation[1]/gmd:CI_Citation[1]/gmd:citedResponsibleParty[1]
      User Services (publisher) at: /gmi:MI_Metadata/gmd:identificationInfo[1]/gmd:MD_DataIdentification[1]/gmd:citation[1]/gmd:CI_Citation[1]/gmd:citedResponsibleParty[2]
      User Services (originator) at: /gmi:MI_Metadata/gmd:identificationInfo[1]/gmd:MD_DataIdentification[1]/gmd:citation[1]/gmd:CI_Citation[1]/gmd:citedResponsibleParty[3]
      GCMD Valids at: /gmi:MI_Metadata/gmd:identificationInfo[1]/gmd:MD_DataIdentification[1]/gmd:descriptiveKeywords[5]/gmd:MD_Keywords[1]/gmd:thesaurusName[1]/gmd:CI_Citation[1]/gmd:citedResponsibleParty[2]
      User Services at: /gmi:MI_Metadata/gmd:distributionInfo[1]/gmd:MD_Distribution[1]/gmd:distributor[1]/gmd:MD_Distributor[1]/gmd:distributorContact[1]
      Brian Meyer at: /gmi:MI_Metadata/gmd:metadataMaintenance[1]/gmd:MD_MaintenanceInformation[1]/gmd:contact[2]
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      CI_OnlineResource

      Count Component Linkage Name Description Function
      1 http://gcmd.gsfc.nasa.gov/Resources/valids/archives/keyword_list.html GCMD Keywords, Version 6.0.0.0.0 Thesuarus for earth science keywords and associated directories hosted and maintained by NASA. information
      1 http://gcmd.nasa.gov/MailComments/MailComments.jsf?rcpt=gcmduso GCMD Feedback Form Have a Comment for the GCMD? information
      1 http://www.getty.edu/research/tools/vocabularies/tgn/index.html Getty Thesaurus of Geographic Names Online Page This page provides an interface to search the Getty Thesaurus of Geographic Names. information
      1 http://www.ngdc.noaa.gov/mgg/fliers/se-0703.html
      1 http://www.ngdc.noaa.gov/mgg/gravity/1999/document/html/tablereg.html
      1 http://www.ngdc.noaa.gov/mgg/gravity/1999cd.html
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      MD_Identifier or RS_Identifier

      none found
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      EX_Extent

      Bounding Box Temporal Extent
      Count Component Description West East North South Start End
      1 -157.986 -152.029 63.9983 60.8298
      1
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      EX_GeographicBoundingBox

      Count Component West East North South
      1 -157.986 -152.029 63.9983 60.8298
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      EX_TemporalExtent

      Count Component Start End
      2
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      MD_Format

      Count Component Name Version specification
      1 Binary
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      MD_Medium

      Count Component Name mediumFormat mediumNote
      1 cdRom iso9660 iso9660
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      MD_Constraints

      Count Component Use Limitation
      1 NOAA Disclaimer While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.
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      MD_ReferenceSystem

      Unresolved Xlinks
      MSL at: /gmi:MI_Metadata/gmd:referenceSystemInfo[1]
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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

      Count Component Attribute Description Content Type
      1
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      MD_Band or MI_Band

      Count Component Identifier Descriptor
      1 latitude This is the geographic latitude expressed as a decimal number. The units are degrees. The range is -90.0 to +90.0.
      1 longitude This is the geographic longitude expressed as a decimal number. The units are degrees. The range is -180.0 to +180.0, where plus designates East longitude and minus designates West longitude.
      1 density_1 Bouguer slab density value used to calculate the Bouguer correction, unique to Alaskan gravity data sets Holitna1 and Holitna2.
      1 density_2 Bouguer slab density value used to calculate the Bouguer correction, unique to Alaskan gravity data sets Holitna1 and Holitna2.
      1 sea_level_elev_m Height of the surface of observation above sea level, in meters (NOTE: most often from terrain surface but may be from lake surface).
      1 obs_grav The observed, or measured value of gravity in mGals at an occupied gravity station. In general, observed gravity varies from 978,000 to 984,200 mgals; therefore, many data contributors subtract a large constant from 900,000 to 982,000 from this field.Note that a constant of 0 mgals has been removed from the obs_grav values and that they are referenced to the IGSN71 datum.
      1 Free_air_anom The anomalous gravity difference between an observed value and theoretical value. The gravity data has been corrected for latitude and elevation (free-air correction), but not for the density of the rock between datum and the plane of measurement (Bouguer correction).Note that the gravity anomaly calculations were computed using the GRS67 model.
      1 Bouguer_anom_simp_dens1 A simple Bouguer anomaly, using a Bouguer slab density specified in field labeled { density_1, density_2 }, unique to Alaskan gravity data sets Holitna1 and Holitna2.
      1 Bouguer_anom_comp_dens1 A complete Bouguer anomaly, including terrain correction, using a Bouguer slab density specified in field labeled { density_1, density_2 }, unique to Alaskan gravity data sets Holitna1 and Holitna2.
      1 Bouguer_anom_simp_dens2 A simple Bouguer anomaly, using a Bouguer slab density specified in field labeled { density_1, density_2 }, unique to Alaskan gravity data sets Holitna1 and Holitna2.
      1 Bouguer_anom_comp_dens2 A complete Bouguer anomaly, including terrain correction, using a Bouguer slab density specified in field labeled { density_1 , density_2 }, unique to Alaskan gravity data sets Holitna1 and Holitna2.
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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

      Count Component Title Date Description
      1 Gravity Data for Southwestern Alaska Source Contribution: Gravity survey data Source Type: varies
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      LE_ProcessStep or LI_ProcessStep

      Count Component DateTime Description
      1 All data was processed by the source before being forwarded to the National Geophysical Data Center
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      MI_Operation

      none found
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      MI_Platform

      none found
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      MI_Instrument

      none found
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