Metadata Identifier: gov.noaa.ngdc.mgg.geophysics:G01434

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 Terrain Corrected Free Air Anomalies (97) This 2' gravity anomaly grid for Mexico, North-Central America and the Western Caribbean Sea is NOT the input data set used in the development of the MEXICO97 model. This gravity grid represents one million gravity measurements held in the NGS gravity database as of March 1997. The data used in this grid have NOT been augmented by gravity data contributions from NGA (former National Imagery and Mapping Agency), but have been augmented by 2'x2' satellite-altimeter-derived gravity anomalies computed by Sandwell and Smith (1997). Please note that the MEXICO97 geoid model does contain the NGA (former National Imagery and Mapping Agency) contributions. Large data gaps south of 20 degrees North latitude were filled with15'x15' gravity values derived from the EGM96 global geopotential model. 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, centered at the origin of the International Terrestrial Reference Frame 1994 (ITRF94(1996.0)). Additional information is available at:http://www.ngs.noaa.gov
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SV_Identification

none found
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CI_Citation

Count Component Title Date Citation Identifier
1 GCMD Data Center Keywords Global Change Master Directory (GCMD) Data Center Keywords
    2020-01-09
1 GCMD Location Keywords Global Change Master Directory (GCMD) Location Keywords
    2020-01-09
1 GCMD Project Keywords Global Change Master Directory (GCMD) Project Keywords
    2020-01-09
1 NASA/GCMD Science Keywords Global Change Master Directory (GCMD) Science Keywords
    2020-01-09
1 Mean Sea Level depth
    2012-08-10
2 Mexico Terrain Corrected Free Air Anomalies (97)
    1999-01-01
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 https://epsg.org/crs_5715/MSL-depth.html
    1 Susan Mclean (processor) processor
    3 Brian Meyer Brian Meyer NOAA National Centers for Environmental Information Brian.Meyer@noaa.gov pointOfContact
    1 User Services (publisher) DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce User Services ngdc.info@noaa.gov 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 https://epsg.org/home.html
    4 GCMD Landing Page NASA Goddard Space Flight Center, Earth Science Data and Information System custodian https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords
    1 NCEI (publisher) NOAA National Centers for Environmental Information publisher
    1 Anna Milan NOAA National Centers for Environmental Information Metadata Specialist editor
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    CI_OnlineResource

    Count Component Linkage Name Description Function
    1 https://epsg.org/crs_5715/MSL-depth.html MSL depth GML for Vertical CRS in EPGS Registry. information
    1 https://epsg.org/home.html 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
    4 https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information
    1 https://www.ngdc.noaa.gov/mgg/fliers/se-0703.html
    1 https://www.ngdc.noaa.gov/mgg/gravity/1999/document/html/tablegri.html
    1 https://www.ngdc.noaa.gov/mgg/gravity/1999cd.html
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    MD_Identifier or RS_Identifier

    Count Component Code
    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 -121 -73 35 12
    1
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    EX_GeographicBoundingBox

    Count Component West East North South
    1 -121 -73 35 12
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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
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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 1441
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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

    none found
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    LE_Source or LI_Source

    Count Component Title Date Description
    1 Mexico Terrain Corrected Free Air Anomalies (97) 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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