| Gravity Data For The Maryland/Virginia Area | spatialRepresentationInfo|
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| (MI_Metadata) fileIdentifier: gov.noaa.ngdc.mgg.geophysics:G01475 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_VectorSpatialRepresentation) geometricObjects: (MD_GeometricObjects) geometricObjectType: (MD_GeometricObjectTypeCode) point geometricObjectCount: 5905 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: Gravity Data For The Maryland/Virginia Area 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 gravity station data (5,905 records) were compiled by the U. S. Geological Survey. This data base was received on July 11, 1997. Principal gravity parameters include observed gravity, Free-air anomalies and Bouguer anomalies. The Bouguer gravity anomaly values were computed using the 1967 gravity formula (International Association of Geodesy, 1971). See Open-File Report 90-265 for further information. 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>United States of America>Maryland 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: -79.4793 eastBoundLongitude: -75.7073 southBoundLatitude: 38.0388 northBoundLatitude: 39.9992 temporalElement: (EX_TemporalExtent) extent: TimePeriod: beginPosition: endPosition: return to top contentInfo: (MD_CoverageDescription) attributeDescription: (unknown) contentType: (unknown) dimension: (MD_Band) sequenceIdentifier: MemberName: aName: latitude attributeType: (unknown) descriptor: This is the geographic latitude expressed as a decimal number. The units are degrees. The range is -90.0 to +90.0. maxValue: Real: 39.9992 minValue: Real: 38.0388 units: UnitDefinition: identifier: degrees name: degrees dimension: (MD_Band) sequenceIdentifier: MemberName: aName: longitude_min attributeType: (unknown) descriptor: The minute portion of the longitude when the longitude is given in degrees, minutes, and seconds. Values range from 0 to less than 60. maxValue: Real: -75.7073 minValue: Real: -79.4793 units: UnitDefinition: identifier: degrees name: degrees dimension: (MD_Band) sequenceIdentifier: MemberName: aName: sea_level_elev_ft attributeType: (unknown) descriptor: Height of the surface of observation above sea level, in feetNOTE: most often from terrain surface but may be from lake surface. maxValue: Real: 3040.0 minValue: Real: -0.9 units: UnitDefinition: identifier: Feet name: Feet dimension: (MD_Band) sequenceIdentifier: MemberName: aName: obs_grav attributeType: (unknown) descriptor: The observed, or measured value of gravity in mGals at an occupied gravity station. maxValue: Real: 980154.75 minValue: Real: 979879.60 units: UnitDefinition: identifier: milligals name: milligals dimension: (MD_Band) sequenceIdentifier: MemberName: aName: terr_corr attributeType: (unknown) descriptor: The terrain correction is an adjustment to the simple Bouguer correction that accounts for variations in terrain above and below the elevation of the gravity station at distances away from the point of measurement. Terrain below and above the level of the theoretical horizontal slab used to make the simple Bouguer correction results in a mass deficiency or excess that always yields an erroneously low gravity measurement at the point of observation. As a consequence, the terrain correction is always added to the simple Bouguer correction. maxValue: Real: 5.59 minValue: Real: -0.12 units: UnitDefinition: identifier: milligals name: milligals dimension: (MD_Band) sequenceIdentifier: MemberName: aName: curvature_corr attributeType: (unknown) descriptor: The Bouguer gravity correction assumes that the mass between the measurement elevation and sea level can be approximated by an infinite slab (often using a slab density of 2.67 grams per cc). The curvature correction is subtracted from the Bouguer gravity correction and compensates for the mass of this slab which extends beyond the curvature of the Earth. The U.S. Geological Survey computes it as follows: curvature_corr = elev*(1.4639108e-3+elev*(4.449648e-14*elev-3.532715e-7))Where elev is the elevation of the gravity station in meters and the curvature correction is in units of milligals. This correction rarely exceeds a few tenths of a milligal and is often omitted. maxValue: Real: 0.00 minValue: Real: -1.05 units: UnitDefinition: identifier: milligals name: milligals dimension: (MD_Band) sequenceIdentifier: MemberName: aName: Free_air_anom attributeType: (unknown) descriptor: The anomalous gravity difference between an observed value and theoretical value. The gravity data has been corrected for latitude and elevation (free-air correction), but not for the density of the rock between datum and the plane of measurement (Bouguer correction). maxValue: Real: 59.27 minValue: Real: -53.89 units: UnitDefinition: identifier: milligals name: milligals dimension: (MD_Band) sequenceIdentifier: MemberName: aName: Bouguer_anom attributeType: (unknown) descriptor: The residual value obtained after latitude correction, elevation correction (including both free-air and Bouguer corrections) and terrain corrections have been applied to gravity data. In many situations the terrain correction is assumed to be zero. When this is explicitly documented, the term " Simple Bouguer Anomaly " is often used. When one explicitly documents that the terrain correction has been applied the term " Complete Bouguer Anomaly " is often used. maxValue: Real: 47.15 minValue: Real: -74.61 units: UnitDefinition: identifier: milligals name: milligals return to top contentInfo: (MD_FeatureCatalogueDescription) includedWithDataset: true featureTypes: LocalName: featureCatalogueCitation: (unknown) (CI_Citation) title: Entity and Attribute Information date: (unknown) otherCitationDetails: Entity and Attribute Overview: Unavailable Entity and Attribute Detail Citation: See section 2.5.2 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: 242105 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/tablereg.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 was 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: Gravity Data For The Maryland/Virginia Area date: (CI_Date) date: (unknown) dateType: (CI_DateTypeCode) publication citedResponsibleParty: (CI_ResponsibleParty) organisationName: DOI/USGS > U.S. Geological Survey, U.S. Department of the Interior contactInfo: (CI_Contact) phone: (CI_Telephone) voice: (703) 648-5953 address: (CI_Address) deliveryPoint: 12201 Sunrise Valley Drive city: Reston administrativeArea: VA postalCode: 20192 country: USA onlineResource: (CI_OnlineResource) linkage: http://www.usgs.gov/ask/index.php role: (CI_RoleCode) originator sourceExtent: (EX_Extent) temporalElement: (unknown) (EX_TemporalExtent) extent: TimePeriod: beginPosition: endPosition: return to top metadataMaintenance: (MD_MaintenanceInformation) maintenanceAndUpdateFrequency: (MD_MaintenanceFrequencyCode) annually dateOfNextUpdate: 2011-04-23 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 2012-10-10T10:32:43.126-06:00 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 | |