Mexico Geoid Heights (MEXICO97) | spatialRepresentationInfo|
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(MI_Metadata) fileIdentifier: gov.noaa.ngdc.mgg.geophysics:G01433 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) return to top spatialRepresentationInfo: (MD_GridSpatialRepresentation) numberOfDimensions: 2 axisDimensionProperties: (MD_Dimension) dimensionName: (MD_DimensionNameTypeCode) row dimensionSize: 571 resolution: Measure: 0.03333333333333333 axisDimensionProperties: (MD_Dimension) dimensionName: (MD_DimensionNameTypeCode) column dimensionSize: 1321 resolution: Measure: 0.03333333333333333 cellGeometry: (MD_CellGeometryCode) area transformationParameterAvailability: (unknown) return to top referenceSystemInfo: (MD_ReferenceSystem) referenceSystemIdentifier: (RS_Identifier) authority: (CI_Citation) title: Mean Sea Level depth alternateTitle: MSL depth date: (CI_Date) date: 2012-08-10 dateType: (CI_DateTypeCode) revision citedResponsibleParty: (CI_ResponsibleParty) organisationName: (withheld) contactInfo: (CI_Contact) onlineResource: (CI_OnlineResource) linkage: https://epsg.org/crs_5715/MSL-depth.html name: MSL depth description: GML for Vertical CRS in EPGS Registry. function: (CI_OnLineFunctionCode) information role: (CI_RoleCode) resourceProvider citedResponsibleParty: (CI_ResponsibleParty) organisationName: European Petroleum Survey Group contactInfo: (CI_Contact) onlineResource: (CI_OnlineResource) linkage: https://epsg.org/home.html name: European Petroleum Survey Group Geodetic Parameter Registry description: Registry that accesses the EPSG Geodetic Parameter Dataset, which is a structured dataset of Coordinate Reference Systems and Coordinate Transformations. function: (CI_OnLineFunctionCode) search role: (CI_RoleCode) publisher code: urn:ogc:def:crs:EPSG::5715 return to top identificationInfo: (MD_DataIdentification) citation: (CI_Citation) title: Mexico Geoid Heights (MEXICO97) 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: This 2' geoid height grid for Mexico, and North-Central America, is the MEXICO97 geoid model. The computation used about one million terrestrial and marine gravity measurements held in the NGS database as of March 1997. These gravity measurements were augmented by data contributions from NGA (former National Imagery and Mapping Agency), and satellite altimeter-derived gravity anomalies computed by Sandwell and Smith (1997). Large data gaps south of 20 degrees North latitude were filled with 15'x15' gravity values derived from the EGM96 global geopotential model. This helped control interpolation errors across the data gaps during the gridding of terrain corrected Bouguer anomalies. After gridding of the Bouguer anomalies, the Bouguer plate was restored, a degree 360 model of gravity anomalies (from EGM96) was removed, and the residual free-air anomalies in the data gaps (south of 20 degrees North Latitude) were zeroed. (This zeroing was found to be the best way currently available to yield a reasonable geoid in the data gaps). The residual Faye anomalies were converted to residual co-geoid undulations through a 1-D FFT formulation of Stokes' integral, and finally the EGM96 undulation model was restored, and the indirect effect applied. This means that in the data gaps, long wavelength information is provided by EGM96, short wavelength information is provided by the 2'x2' DTED (during the application of the indirect effect), but medium wavelength information (usually provided by gravity measurements) is missing altogether. Although the exact accuracy of the geoid in the data gaps is difficult to ascertain, the quoted accuracy for EGM96 (which is the primary source of geoid information in the data gaps) is below 50 cm in these areas. 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/GEOID/MEXICO97/ We are particularly grateful to NGA (former National Imagery and Mapping Agency) for their assistance and their data contributions. 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>Mexico 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: -119 eastBoundLongitude: -75 southBoundLatitude: 14 northBoundLatitude: 33 temporalElement: (EX_TemporalExtent) extent: TimePeriod: beginPosition: endPosition: return to top contentInfo: (MD_CoverageDescription) attributeDescription: (unknown) contentType: (unknown) dimension: (MD_Band) sequenceIdentifier: MemberName: aName: Gravity grid value attributeType: (unknown) descriptor: Value, in milligals of an observed gravity station value, after various corrections have been applied to the value. maxValue: Real: 6.759 minValue: Real: -47.597 units: UnitDefinition: identifier: name: return to top contentInfo: (MD_FeatureCatalogueDescription) includedWithDataset: true featureTypes: LocalName: featureCatalogueCitation: (unknown) return to top 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: 3017164 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 iso9660 return to top 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 return to top 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) processor: (CI_ResponsibleParty) role: (CI_RoleCode) processor source: (LI_Source) description: Source Contribution: Gravity survey data Source Type: varies sourceCitation: (CI_Citation) title: Mexico Geoid Heights (MEXICO97) date: (CI_Date) date: (unknown) dateType: (CI_DateTypeCode) publication citedResponsibleParty: (CI_ResponsibleParty) organisationName: DOC/NOAA/NOS/NGS > National Geodetic Survey, National Ocean Service, NOAA, U.S. Department of Commerce contactInfo: (CI_Contact) phone: (CI_Telephone) voice: 301-713-3191 facsimile: 301-713-4324 address: (CI_Address) deliveryPoint: Spatial Reference System Division 1315 East-West Highway N/NGS2, SSMC3, Room 8813 city: Silver Spring administrativeArea: MD postalCode: 20910 country: U.S.A. electronicMailAddress: ngs.cors@noaa.gov role: (CI_RoleCode) custodian sourceExtent: (EX_Extent) temporalElement: (unknown) (EX_TemporalExtent) extent: TimePeriod: beginPosition: endPosition: return to top 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 2012-10-10T10:32:28.867-06:00 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 |