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DNAG Gravity Data


 (MI_Metadata)
    fileIdentifier:  gov.noaa.ngdc.mgg.geophysics:G01497
    language:  eng; USA
    characterSet:  (MD_CharacterSetCode) utf8
    hierarchyLevel:  (MD_ScopeCode) dataset
    contact:  (CI_ResponsibleParty)
        individualName:  Brian Meyer
        organisationName:  NOAA National Centers for Environmental Information
        contactInfo:  (CI_Contact)
            phone:  (CI_Telephone)
                voice:  303-497-6125
            address:  (CI_Address)
                electronicMailAddress:  Brian.Meyer@noaa.gov
        role:  (CI_RoleCode) pointOfContact
    dateStamp:  2017-09-25
    metadataStandardName:  ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
    metadataStandardVersion:  ISO 19115-2:2009(E)
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    spatialRepresentationInfo:  (MD_GridSpatialRepresentation)
        numberOfDimensions:  2
        axisDimensionProperties:  (MD_Dimension)
            dimensionName:  (MD_DimensionNameTypeCode) row
            dimensionSize:  1430
        axisDimensionProperties:  (MD_Dimension)
            dimensionName:  (MD_DimensionNameTypeCode) column
            dimensionSize:  1495
        cellGeometry:  (MD_CellGeometryCode) area
        transformationParameterAvailability: (unknown)
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    referenceSystemInfo: (template)
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    identificationInfo:  (MD_DataIdentification)
        citation:  (CI_Citation)
            title:  DNAG Gravity Data
            date:  (CI_Date)
                date:  1999-01-01
                dateType:  (CI_DateTypeCode) publication
            edition:  1999 Edition
            citedResponsibleParty:  (CI_ResponsibleParty)
                organisationName:  NOAA National Centers for Environmental Information
                role:  (CI_RoleCode) publisher
            citedResponsibleParty:  (CI_ResponsibleParty)
                organisationName:  DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
                positionName:  User Services
                contactInfo:  (CI_Contact)
                    phone:  (CI_Telephone)
                        voice:  303-497-6826
                        facsimile:  303-497-6513
                    address:  (CI_Address)
                        deliveryPoint:  325 Broadway
                        city:  Boulder
                        administrativeArea:  CO
                        postalCode:  80305-3328
                        country:  USA
                        electronicMailAddress:  ngdc.info@noaa.gov
                    hoursOfService:  8am-5pm, Monday through Friday
                role:  (CI_RoleCode) publisher
            citedResponsibleParty:  (CI_ResponsibleParty)
                organisationName:  DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
                positionName:  User Services
                contactInfo:  (CI_Contact)
                    phone:  (CI_Telephone)
                        voice:  303-497-6826
                        facsimile:  303-497-6513
                    address:  (CI_Address)
                        deliveryPoint:  325 Broadway
                        city:  Boulder
                        administrativeArea:  CO
                        postalCode:  80305-3328
                        country:  USA
                        electronicMailAddress:  ngdc.info@noaa.gov
                    hoursOfService:  8am-5pm, Monday through Friday
                role:  (CI_RoleCode) originator
        abstract:  The Decade of North American Geology (DNAG) gravity grid values, spaced at 6 km, were used to produce the Gravity Anomaly Map of North America (1987; scale 1:5,000,000). Considerable caution should be exercised when using these gridded data in regions of sparse coverage (for example, deep oceanic areas). The spatial distribution of the original data from which the grid was generated is shown on sheet 5 of the published map. Note: There are no gridded data values for Mexico.
        purpose:  To provide easy access to global and regional gravity data and related models for scientific studies.
        status:  (MD_ProgressCode) completed
        pointOfContact:  (CI_ResponsibleParty)
            individualName:  Brian Meyer
            organisationName:  NOAA National Centers for Environmental Information
            contactInfo:  (CI_Contact)
                phone:  (CI_Telephone)
                    voice:  303-497-6125
                address:  (CI_Address)
                    electronicMailAddress:  Brian.Meyer@noaa.gov
            role:  (CI_RoleCode) pointOfContact
        resourceMaintenance:  (MD_MaintenanceInformation)
            maintenanceAndUpdateFrequency:  (MD_MaintenanceFrequencyCode) irregular
        descriptiveKeywords:  (MD_Keywords)
            keyword:  EARTH SCIENCE>SOLID EARTH>Geodetics/Gravity>Control Surveys
            keyword:  EARTH SCIENCE>SOLID EARTH>Geodetics/Gravity>Gravitational Field
            keyword:  EARTH SCIENCE>SOLID EARTH>Geodetics/Gravity>Gravity
            keyword:  EARTH SCIENCE>SOLID EARTH>Geodetics/Gravity>Reference Systems
            keyword:  EARTH SCIENCE>SOLID EARTH>Geodetics/Gravity>Satellite Orbits
            type:  (MD_KeywordTypeCode) theme
            thesaurusName:  (CI_Citation)
                title:  Global Change Master Directory (GCMD) Science Keywords
                date:  (CI_Date)
                    date:  2020-01-09
                    dateType:  (CI_DateTypeCode) publication
                edition:  9.1
                citedResponsibleParty:  (CI_ResponsibleParty)
                    organisationName:  NASA Goddard Space Flight Center, Earth Science Data and Information System
                    contactInfo:  (CI_Contact)
                        onlineResource:  (CI_OnlineResource)
                            linkage: https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords
                            name:  Global Change Master Directory (GCMD) Keywords
                            description:  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.
                            function:  (CI_OnLineFunctionCode) information
                    role:  (CI_RoleCode) custodian
        descriptiveKeywords:  (MD_Keywords)
            keyword:  Absolute Gravity
            keyword:  Bouguer Gravity
            keyword:  Free Air Anomaly
            keyword:  Gridded Gravity
            keyword:  Land Gravity
            keyword:  Observed Gravity
            type:  (MD_KeywordTypeCode) theme
            thesaurusName:  (CI_Citation)
                title:  Uncontrolled Keywords
                date: (unknown)
        descriptiveKeywords:  (MD_Keywords)
            keyword:  ICSU-WDS > International Council for Science - World Data System
            type:  (MD_KeywordTypeCode) project
            thesaurusName:  (CI_Citation)
                title:  Global Change Master Directory (GCMD) Project Keywords
                date:  (CI_Date)
                    date:  2020-01-09
                    dateType:  (CI_DateTypeCode) publication
                edition:  9.1
                citedResponsibleParty:  (CI_ResponsibleParty)
                    organisationName:  NASA Goddard Space Flight Center, Earth Science Data and Information System
                    contactInfo:  (CI_Contact)
                        onlineResource:  (CI_OnlineResource)
                            linkage: https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords
                            name:  Global Change Master Directory (GCMD) Keywords
                            description:  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.
                            function:  (CI_OnLineFunctionCode) information
                    role:  (CI_RoleCode) custodian
        descriptiveKeywords:  (MD_Keywords)
            keyword:  Continent>North America
            type:  (MD_KeywordTypeCode) place
            thesaurusName:  (CI_Citation)
                title:  Global Change Master Directory (GCMD) Location Keywords
                date:  (CI_Date)
                    date:  2020-01-09
                    dateType:  (CI_DateTypeCode) publication
                edition:  9.1
                citedResponsibleParty:  (CI_ResponsibleParty)
                    organisationName:  NASA Goddard Space Flight Center, Earth Science Data and Information System
                    contactInfo:  (CI_Contact)
                        onlineResource:  (CI_OnlineResource)
                            linkage: https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords
                            name:  Global Change Master Directory (GCMD) Keywords
                            description:  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.
                            function:  (CI_OnLineFunctionCode) information
                    role:  (CI_RoleCode) custodian
        descriptiveKeywords:  (MD_Keywords)
            keyword:  DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
            keyword:  DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
            type:  (MD_KeywordTypeCode) dataCentre
            thesaurusName:  (CI_Citation)
                title:  Global Change Master Directory (GCMD) Data Center Keywords
                date:  (CI_Date)
                    date:  2020-01-09
                    dateType:  (CI_DateTypeCode) publication
                edition:  9.1
                citedResponsibleParty:  (CI_ResponsibleParty)
                    organisationName:  NASA Goddard Space Flight Center, Earth Science Data and Information System
                    contactInfo:  (CI_Contact)
                        onlineResource:  (CI_OnlineResource)
                            linkage: https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords
                            name:  Global Change Master Directory (GCMD) Keywords
                            description:  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.
                            function:  (CI_OnLineFunctionCode) information
                    role:  (CI_RoleCode) custodian
        resourceConstraints:  (MD_LegalConstraints)
            accessConstraints:  (MD_RestrictionCode) otherRestrictions
            otherConstraints:  Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.
        resourceConstraints:  (MD_LegalConstraints)
            useConstraints:  (MD_RestrictionCode) otherRestrictions
            otherConstraints:  Use Constraints: If you use this data, please cite the National Geophysical Data Center and the originator of the data.
        resourceConstraints:  (MD_LegalConstraints)
            accessConstraints:  (MD_RestrictionCode) otherRestrictions
            otherConstraints:  Access Constraints: None
        spatialRepresentationType:  (MD_SpatialRepresentationTypeCode) grid
        language:  eng; USA
        topicCategory:  (MD_TopicCategoryCode) geoscientificInformation
        extent:  (EX_Extent)
            geographicElement:  (EX_GeographicBoundingBox)
                westBoundLongitude:  170.00000
                eastBoundLongitude:  -10.75
                southBoundLatitude:  5.16667
                northBoundLatitude:  81.16667
            temporalElement:  (EX_TemporalExtent)
                extent:
                  TimePeriod:
                    beginPosition:
                    endPosition:
        supplementalInformation:  Note that this Spherical Transverse Mercator projection is a unique projection used for the DNAG map series. In addition to giving the Bounding Coordinates in latitude and longitude, the limits of coverage for the gridded and projected data sets are also given in units of measure of the projection. This is usually the distance from a central meridian (the x-coordinate), or base latitude (the y-coordinate), in meters or kilometers of the given projection. For this data set those boundaries are: The Western-most boundary: -4480 kilometersThe Eastern-most boundary: 4500 kilometersThe Northern-most boundary: 9280 kilometersThe Southern-most boundary: 700 kilometers
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    contentInfo:  (MD_CoverageDescription)
        attributeDescription: (unknown)
        contentType: (unknown)
        dimension:  (MD_Band)
            sequenceIdentifier:
              MemberName:
                aName:  Gravity Anomaly
                attributeType: (unknown)
            descriptor:  Value of estimated gravity
            maxValue:
              Real:  341.7
            minValue:
              Real:  -367.3
            units:
              UnitDefinition:
                identifier:  milligals
                name:  milligals
        dimension:  (MD_Band)
            sequenceIdentifier:
              MemberName:
                aName:  grid_origin
                attributeType: (unknown)
            descriptor:  The location of the starting point of a grid, e.g. lowerleft, upperleft
        dimension:  (MD_Band)
            sequenceIdentifier:
              MemberName:
                aName:  grid_sequence
                attributeType: (unknown)
            descriptor:  The sequence of the grid values, some examples are:Top to bottom then rightTop to bottom then leftLeft to right then upRight to left then down
        dimension:  (MD_Band)
            sequenceIdentifier:
              MemberName:
                aName:  grid_cell_registration
                attributeType: (unknown)
            descriptor:  The positional information associated with registration of a grid cell, e.g.:Center of cellBottom left cornerBottom right cornerTop left cornerTop right corner
        dimension:  (MD_Band)
            sequenceIdentifier:
              MemberName:
                aName:  missing_flag
                attributeType: (unknown)
            descriptor:  A numeric code indicating missing data values
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    contentInfo:  (MD_FeatureCatalogueDescription)
        includedWithDataset:  true
        featureTypes:
          LocalName:
        featureCatalogueCitation: (unknown)
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    distributionInfo:  (MD_Distribution)
        distributionFormat:  (MD_Format)
            name:  Binary
            version: (unknown)
        distributor:  (MD_Distributor)
            distributorContact:  (CI_ResponsibleParty)
                organisationName:  DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
                positionName:  User Services
                contactInfo:  (CI_Contact)
                    phone:  (CI_Telephone)
                        voice:  303-497-6826
                        facsimile:  303-497-6513
                    address:  (CI_Address)
                        deliveryPoint:  325 Broadway
                        city:  Boulder
                        administrativeArea:  CO
                        postalCode:  80305-3328
                        country:  USA
                        electronicMailAddress:  ngdc.info@noaa.gov
                    hoursOfService:  8am-5pm, Monday through Friday
                role:  (CI_RoleCode) distributor
            distributionOrderProcess:  (MD_StandardOrderProcess)
                fees:  Depends on the data set
                orderingInstructions:  Ordering Instructions: Price information is available upon request. Prepay by check, money order or bank card. There is a standard handling charge, with additional costs for special handling. Orders may be placed via fax, email, regular mail or telephone. Custom Order Process: Contact Data Center for information.
                turnaround:  4 Days
        transferOptions:  (MD_DigitalTransferOptions)
            transferSize:
              Real:  4275700
            onLine:  (CI_OnlineResource)
                linkage: https://www.ngdc.noaa.gov/mgg/fliers/se-0703.html
            onLine:  (CI_OnlineResource)
                linkage: https://www.ngdc.noaa.gov/mgg/gravity/1999/document/html/tablegri.html
            onLine:  (CI_OnlineResource)
                linkage: https://www.ngdc.noaa.gov/mgg/gravity/1999cd.html
        transferOptions:  (MD_DigitalTransferOptions)
            offLine:  (MD_Medium)
                name:  (MD_MediumNameCode) cdRom
                mediumFormat:  (MD_MediumFormatCode) iso9660
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    dataQualityInfo:  (DQ_DataQuality)
        scope:  (DQ_Scope)
            level:  (MD_ScopeCode) repository
            levelDescription:  (MD_ScopeDescription)
                other:  NOAA National Centers for Environmental Information
        lineage:  (LI_Lineage)
            processStep:  (LE_ProcessStep)
                description:  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.
                dateTime:
                  DateTime:  2015-04-22T00:00:00
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    dataQualityInfo:  (DQ_DataQuality)
        scope:  (DQ_Scope)
            level:  (MD_ScopeCode) dataset
        report:  (DQ_AbsoluteExternalPositionalAccuracy)
            nameOfMeasure:  Horizontal Positional Accuracy Report
            evaluationMethodDescription:  Horizontal accuracy varies from source contributor to source contributor. However, horizontal positions are usually taken from topographic maps of the area being surveyed. Accuracy may range up to +/- 100 feet.
            result: (missing)
        report:  (DQ_AbsoluteExternalPositionalAccuracy)
            nameOfMeasure:  Vertical Positional Accuracy Report
            evaluationMethodDescription:  Vertical accuracy varies from source contributor to source contributor. However, vertical positions are usually taken from topographic maps of the area being surveyed, monumented benchmark locations, or they are determined by the use of the Global Positioning System (GPS). Accuracy may range from meters to centimeters or better.
            result: (missing)
        report:  (DQ_CompletenessCommission)
            evaluationMethodDescription:  Not available
            result: (unknown)
        report:  (DQ_ConceptualConsistency)
            measureDescription:  Not available
            result: (unknown)
        report:  (DQ_QuantitativeAttributeAccuracy)
            nameOfMeasure:  Quantitative Attribute Accuracy Assessment
            measureDescription:  Statistical analysis.
            evaluationMethodDescription:  Gravity data values are the result of the measurement of small variations in the gravitational field of the Earth. The magnitudes and ranges of these variations are well known in the potential field discipline.
            result:  (DQ_QuantitativeResult)
                valueUnit:
                  BaseUnit:
                    identifier:  meters
                    unitsSystem:  http://www.bipm.org/en/measurement-units/
                value:
                  Record:  Variable: the average acceleration on the Earth's surface is about 980 centimeters per second squared, which is equal to 980 gals, but increases by about 1/2 percent from equator to pole.
        lineage:  (LI_Lineage)
            processStep:  (LE_ProcessStep)
                description:  All data were processed by the source before being forwarded to the National Geophysical Data Center
                dateTime: (unknown)
            source:  (LI_Source)
                description:  Source Contribution: Gridded gravity data Source Type: varies
                sourceCitation:  (CI_Citation)
                    title:  DNAG Gravity Data
                    date:  (CI_Date)
                        date: (unknown)
                        dateType:  (CI_DateTypeCode) publication
                    citedResponsibleParty:  (CI_ResponsibleParty)
                        organisationName:  The Geological Society of America
                        contactInfo:  (CI_Contact)
                            phone:  (CI_Telephone)
                                voice:  (303) 357-1000
                            address:  (CI_Address)
                                deliveryPoint:  P.O. Box 9140
                                city:  Boulder
                                administrativeArea:  Colorado
                                postalCode:  80301-9140
                                country:  United States
                                electronicMailAddress:  gsaservice@geosociety.org
                        role:  (CI_RoleCode) originator
                sourceExtent:  (EX_Extent)
                    temporalElement: (unknown)  (EX_TemporalExtent)
                        extent:
                          TimePeriod:
                            beginPosition:
                            endPosition:
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    metadataMaintenance:  (MD_MaintenanceInformation)
        maintenanceAndUpdateFrequency:  (MD_MaintenanceFrequencyCode) annually
        dateOfNextUpdate:  2015-11-01
        maintenanceNote:  This metadata was automatically generated from the Content Standards for Digital Geospatial Metadata standard (version FGDC-STD-001-1998) using the 2012-08-08 version of the FGDC RSE to ISO 19115-2 transform.
        maintenanceNote:  Translated from FGDC 2012-10-10T10:32:50.881-06:00
        maintenanceNote:  Last Metadata Review Date: 2017-09-25
        maintenanceNote:  This record has been automatically modified to include references to NCEI where applicable on 2015-09-01.
        contact:  (CI_ResponsibleParty)
            organisationName:  NOAA National Centers for Environmental Information
            positionName:  Metadata Specialist
            role:  (CI_RoleCode) editor
        contact:  (CI_ResponsibleParty)
            individualName:  Brian Meyer
            organisationName:  NOAA National Centers for Environmental Information
            contactInfo:  (CI_Contact)
                phone:  (CI_Telephone)
                    voice:  303-497-6125
                address:  (CI_Address)
                    electronicMailAddress:  Brian.Meyer@noaa.gov
            role:  (CI_RoleCode) pointOfContact