ISO Table View View Metadata As: Get Data, FAQ, HTML, 19139 XML
Assess Metadata For: Completeness, DOI Readiness, CSW Readiness, Components

Metadata Identifier: gov.noaa.ngdc.mgg.geophysics:G01432

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 Mexico North-South Deflections (DMEX97) This 2' surface deflection of the vertical grid for Mexico, and North-Central is the DMEX97 model. The computation used about one million terrestrial and marine gravity measurements heldin the NGS database as of March 1997. These gravity measurements were augmented by data contributions from NGA (former National Imagery and Mapping Agency), and satellitealtimeter derived gravity anomalies computed by Sandwell and Smith (1997). The deflection values themselves were obtained by numerical differentiation of cubic spline models along the meridians of the MEXICO97 geoid grid, followed by a correction for curvature of the plumb line, yielding surface deflections of the vertical. Since the EGM96 model was used to fill data gaps south of 20 degrees North latitude, the deflections in and around those regions will be less accurate. The gravity values are based on the International Gravity Standardization Net 1971 (IGSN71). The deflections are referred to Geodetic Reference System 1980 (GRS80) ellipsoidal normals oriented in the International Terrestrial Reference Frame 1994 (ITRF94(1996.0)). We are particularly grateful to NGA (former National Imagery and Mapping Agency) for their assistance and their data contributions.
Top

SV_Identification

none found
Top

CI_Citation

Count Component Title Date Citation Identifier
1 Mean Sea Level depth
  • 2012-08-10
2 Mexico North-South Deflections (DMEX97)
  • 1999-01-01
1 GCMD Data Center Keywords NASA/GCMD Data Center Keywords
    1 GCMD Location Keywords NASA/GCMD Location Keywords
      1 NASA/GCMD Science Keywords NASA/Global Change Master Directory (GCMD) Earth Science Keywords
      • 2007-04
      1 Uncontrolled Keywords
        Top

        CI_Series

        none found
        Top

        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
        2 GCMD Valids custodian http://gcmd.nasa.gov/learn/keyword_list.html
        2 Brian Meyer Brian Meyer DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce Brian.Meyer@noaa.gov pointOfContact
        1 User Services (publisher) DOC/NOAA/NESDIS/NGDC - National Geophysical Data Center User Services ngdc.info@noaa.gov publisher
        1 User Services (originator) DOC/NOAA/NESDIS/NGDC - National Geophysical Data Center User Services ngdc.info@noaa.gov originator
        1 User Services DOC/NOAA/NESDIS/NGDC - National Geophysical Data Center 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/
        2 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/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce Susan.McLean@noaa.gov pointOfContact
        1 Susan Mclean (processor) Susan McLean DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce Susan.McLean@noaa.gov processor
        Top

        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
        2 http://gcmd.nasa.gov/MailComments/MailComments.jsf?rcpt=gcmduso GCMD Feedback Form Have a Comment for the GCMD? information
        2 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
        Top

        MD_Identifier or RS_Identifier

        Count Component Code
        1 urn:ogc:def:crs:EPSG::5715
        Top

        EX_Extent

        Bounding Box Temporal Extent
        Count Component Description West East North South Start End
        1 -119 -75 33 14
        1
        Top

        EX_GeographicBoundingBox

        Count Component West East North South
        1 -119 -75 33 14
        Top

        EX_TemporalExtent

        Count Component Start End
        2
        Top

        MD_Format

        Count Component Name Version specification
        1 Binary
        Top

        MD_Medium

        Count Component Name mediumFormat mediumNote
        1 cdRom iso9660 iso9660
        Top

        MD_Constraints

        Count Component Use Limitation
        Top

        MD_ReferenceSystem

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

        MD_GridSpatialRepresentation

        Count Component Number of Dimensions Cell Geometry Code
        1 2 area
        Top

        MD_Georeferenceable or MI_Georeferenceable

        none found
        Top

        MD_Georectified or MI_Georectified

        none found
        Top

        MD_Dimension

        Count Component Name Code Size
        1 row 571
        1 column 1321
        Top

        MD_CoverageDescription or MI_CoverageDescription

        Count Component Attribute Description Content Type
        1
        Top

        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.
        Top

        MI_RangeElementDescription

        none found
        Top

        MD_AggregateInformation

        none found
        Top

        LE_Source or LI_Source

        Count Component Title Date Description
        1 Mexico North-South Deflections (DMEX97) Source Contribution: Gravity survey data Source Type: varies
        Top

        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
        Top

        MI_Operation

        none found
        Top

        MI_Platform

        none found
        Top

        MI_Instrument

        none found
        Top