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Metadata Identifier: gov.noaa.ngdc.mgg.geophysics:G01424

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 Alaska Terrain Corrected Free Air Anomalies (96) This 2' x 4' gravity anomaly grid for Alaska is NOT the input data set used in development of the GEOID96 model. This gravity grid models the 1.1 million terrestrial and marine gravity data held in the National Geodetic Survey gravity data base in July 1996. The data used in this grid have NOT been augmented by gravity data contributions from NGA (former National Imagery and Mapping Agency (former Defence Mapping Agency)). Please note that the GEOID96 model itself does contain the NGA (former National Imagery and Mapping Agency) contributions. These gravity values are based on the International Gravity Standardization Net 1971 (IGSN71). Terrain corrected, atmospherically corrected, Bouguer anomalies were computed with respect to the Geodetic Reference System 1980 (GRS80) using NAD83 and NAVD88 coordinates. Terrain corrections were computed by an FFT method from 30" x 60" digital elevation data. These complete Bouguer anomalies were gridded by splines in tension. The free air anomaly grid was obtained by restoring the Bouguer plate with a 2' x 4' mean elevation grid. Additional information is available at: http://www.ngs.noaa.gov/GEOID/geoid.html
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SV_Identification

none found
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CI_Citation

Count Component Title Date Citation Identifier
2 Alaska Terrain Corrected Free Air Anomalies (96)
    1999-01-01
1 Mean Sea Level depth
    2012-08-10
1 GCMD Data Center Keywords NASA/GCMD Data Center Keywords
    1 GCMD Location Keywords NASA/GCMD Location Keywords
      1 GCMD Project Keywords NASA/GCMD Project Keywords
        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 resourceProvider http://www.epsg-registry.org/export.htm?gml=urn:ogc:def:crs:EPSG::5715
          3 GCMD Valids custodian http://gcmd.nasa.gov/learn/keyword_list.html
          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
          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
          1 National Geodetic Survey DOC/NOAA/NOS/NGS > National Geodetic Survey, National Ocean Service, NOAA, U.S. Department of Commerce ngs.cors@noaa.gov custodian
          1 EPSG Registry European Petroleum Survey Group publisher http://www.epsg-registry.org/
          3 GCMD User Support Office NASA GCMD User Support Office gcmduso@gcmd.gsfc.nasa.gov custodian 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 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
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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
          3 http://gcmd.nasa.gov/MailComments/MailComments.jsf?rcpt=gcmduso GCMD Feedback Form Have a Comment for the GCMD? information
          3 GCMD Keyword Page http://gcmd.nasa.gov/learn/keyword_list.html GCMD Keywords Page This page describes the NASA GCMD Keywords, how to reference those keywords and provides download instructions. information
          1 http://www.epsg-registry.org/ European Petroleum Survey Group Geodetic Parameter Registry Registry that accesses the EPSG Geodetic Parameter Dataset, which is a structured dataset of Coordinate Reference Systems and Coordinate Transformations. search
          1 http://www.epsg-registry.org/export.htm?gml=urn:ogc:def:crs:EPSG::5715 MSL depth GML for Vertical CRS in EPGS Registry. information
          1 http://www.ngdc.noaa.gov/mgg/fliers/se-0703.html
          1 http://www.ngdc.noaa.gov/mgg/gravity/1999/document/html/tablegri.html
          1 http://www.ngdc.noaa.gov/mgg/gravity/1999cd.html
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          MD_Identifier or RS_Identifier

          Count Component Code
          1 G01352-CDR-A0001
          1 urn:ogc:def:crs:EPSG::5715
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          EX_Extent

          Bounding Box Temporal Extent
          Count Component Description West East North South Start End
          1 -180 -126 72 49
          1
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          EX_GeographicBoundingBox

          Count Component West East North South
          1 -180 -126 72 49
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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

          Count Component Code Authority Title
          1 MSL urn:ogc:def:crs:EPSG::5715 Mean Sea Level depth
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          MD_GridSpatialRepresentation

          Count Component Number of Dimensions Cell Geometry Code
          1 2 area
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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

          Count Component Name Code Size
          1 row 691
          1 column 931
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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 Gravity grid value Value, in milligals of an observed gravity station value, after various corrections have been applied to the value.
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          MI_RangeElementDescription

          none found
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          MD_AggregateInformation

          Count Component Title Code Association Type Code
          1 G01352-CDR-A0001 crossReference
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          LE_Source or LI_Source

          Count Component Title Date Description
          1 Alaska Terrain Corrected Free Air Anomalies (96) Source Contribution: Gravity survey data Source Type: varies
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          LE_ProcessStep or LI_ProcessStep

          Count Component DateTime Description
          1 All data were processed by the source before being forwarded to the National Geophysical Data Center
          1 2015-04-22T00:00:00 NOAA created the National Centers for Environmental Information (NCEI) by merging NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC), and National Oceanographic Data Center (NODC), including the National Coastal Data Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015.
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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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