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Metadata Identifier: gov.noaa.ngdc.mgg.dem:vdatum

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 NOAA VDatum DEM Project NOAA's National Geophysical Data Center (NGDC) is building high-resolution digital elevation models (DEMs) for select U.S. coastal regions in the Gulf of Mexico. These integrated bathymetric-topographic DEMs were developed for NOAA Coast Survey Development Laboratory (CSDL) through the American Recovery and Reinvestment Act (ARRA) of 2009 to evaluate the utility of the Vertical Datum Transformation tool (VDatum), developed jointly by NOAA's Office of Coast Survey (OCS), National Geodetic Survey (NGS), and Center for Operational Oceanographic Products and Services (CO-OPS). Bathymetric, topographic, and shoreline data used in DEM compilation are obtained from various sources, including NGDC, the U.S. Coastal Services Center (CSC), the U.S. Office of Coast Survey (OCS), the U.S. Army Corps of Engineers (USACE), and other federal, state, and local government agencies, academic institutions, and private companies. DEMs are referenced to the vertical tidal datum of North American Vertical Datum of 1988 (NAVD 88) or Mean High Water (MHW) and horizontal datum of North American Datum of 1983 (NAD 83). Cell size ranges from 1/3 arc-second (~10 meters) to 1 arc-second (~30 meters).
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SV_Identification

Unresolved Xlinks
Color Shaded Relief ArcGIS Map Service at: /gmi:MI_Metadata/gmd:identificationInfo[2]
Footprints ArcGIS Map Service at: /gmi:MI_Metadata/gmd:identificationInfo[3]
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CI_Citation

Count Component Title Date Citation Identifier
1 NASA/GCMD Data Resolution Keywords
    1 NASA/GCMD Earth Science Keywords
      1 NASA/GCMD Location Keywords
        1 NASA/GCMD Platform Keywords
          1 NOAA VDatum DEM Project
            2009-12-01
          1 Uncontrolled
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            CI_Series

            Count Component Name Issue Identification Page
            1 NOAA VDatum DEMs Named by primary coastal city, state in DEM.
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            CI_ResponsibleParty

            Count Component Individual Organization Position Email Role Linkage
            1 Citation URL https://www.ngdc.noaa.gov/mgg/inundation/vdatum/vdatum.html
            1 DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce publisher
            1 DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce (comp) originator
            Unresolved Xlinks
            DEM Info at: /gmi:MI_Metadata/gmd:contact[1]
            NCEI (publisher) at: /gmi:MI_Metadata/gmd:identificationInfo[1]/gmd:MD_DataIdentification[1]/gmd:citation[1]/gmd:CI_Citation[1]/gmd:citedResponsibleParty[1]
            DEM Info at: /gmi:MI_Metadata/gmd:identificationInfo[1]/gmd:MD_DataIdentification[1]/gmd:pointOfContact[1]
            DEM information at: /gmi:MI_Metadata/gmd:distributionInfo[1]/gmd:MD_Distribution[1]/gmd:distributor[1]/gmd:MD_Distributor[1]/gmd:distributorContact[1]
            Matt Love at: /gmi:MI_Metadata/gmd:dataQualityInfo[2]/gmd:DQ_DataQuality[1]/gmd:lineage[1]/gmd:LI_Lineage[1]/gmd:processStep[1]/gmi:LE_ProcessStep[1]/gmd:processor[1]
            Kelly Carignan at: /gmi:MI_Metadata/gmd:metadataMaintenance[1]/gmd:MD_MaintenanceInformation[1]/gmd:contact[1]
            Anna Milan at: /gmi:MI_Metadata/gmd:metadataMaintenance[1]/gmd:MD_MaintenanceInformation[1]/gmd:contact[2]
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            CI_OnlineResource

            Count Component Linkage Name Description Function
            3 https://www.ngdc.noaa.gov/mgg/inundation/vdatum/vdatum.html NOAA VDatum DEM Project Project web page. information
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            MD_Identifier or RS_Identifier

            none found
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            EX_Extent

            Bounding Box Temporal Extent
            Count Component Description West East North South Start End
            1 -90.75 -85.00 31.25 28.50 2009-01-01
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            EX_GeographicBoundingBox

            Count Component West East North South
            1 -90.75 -85.00 31.25 28.50
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            EX_TemporalExtent

            Count Component Start End
            1 2009-01-01
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            MD_Format

            Count Component Name Version specification
            1 ESRI Arc ASCII 1 ASCII text version of ESRI ArcGIS raster format
            1 netCDF 1
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            MD_Medium

            none found
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            MD_Constraints

            Unresolved Xlinks
            not for navigation at: /gmi:MI_Metadata/gmd:identificationInfo[1]/gmd:MD_DataIdentification[1]/gmd:resourceConstraints[1]
            copyright statement at: /gmi:MI_Metadata/gmd:identificationInfo[1]/gmd:MD_DataIdentification[1]/gmd:resourceConstraints[2]
            NOAA disclaimer at: /gmi:MI_Metadata/gmd:identificationInfo[1]/gmd:MD_DataIdentification[1]/gmd:resourceConstraints[3]
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            MD_ReferenceSystem

            none found
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            MD_GridSpatialRepresentation

            none found
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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

            none found
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            MD_CoverageDescription or MI_CoverageDescription

            none found
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            MD_Band or MI_Band

            none found
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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

            none found
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            LE_ProcessStep or LI_ProcessStep

            Count Component DateTime Description
            1 2009-12-01T00:00:00 All datasets obtained by NGDC are converted to common horizontal and vertical datums of NAD 83 geographic and NAVD 88, respectively, using FME and VDatum transformation tool. They are also converted to common file format, ESRI point shapefiles, for visualization and inspection.
            Matt Love at Xpath: /gmi:MI_Metadata/gmd:dataQualityInfo[2]/gmd:DQ_DataQuality[1]/gmd:lineage[1]/gmd:LI_Lineage[1]/gmd:processStep[1]/gmi:LE_ProcessStep[1]/gmd:processor[1]
            1 2009-12-01T00:00:00 Datasets are visually inspected with ArcGIS for identification and editing of data anomalies. Datasets are then compared with overlapping datasets to ensure data consistency.
            1 2009-12-01T00:00:00 xyz files of the bathymetric data are surfaced using GMT's 'surface' tool onto a 1 arc-second grid that is interpolated to fill empty cells. Points extracted every 10 meters along the coastline are also included to ensure that the bathymetric grid reaches zero at the coast. The resulting Arc ASCII grid is imported into ArcGIS and clipped to the coastline to remove values over land.
            1 2009-12-01T00:00:00 xyz files for each input dataset are gridded using MB-System's 'mbgrid' tool, which utilizes a high-tension spline interpolation method to fill grid cells with no input elevation values. Preferential weighting is given to more recent, higher-accuracy datasets. Gridding is typically performed in quadrants, each with a 5% data buffer. The grids are imported in ArcGIS and seamlessly merged to create an NAVD 88 DEM.
            1 2009-12-01T00:00:00 The DEMs are quantitatively evaluated by comparing with source datasets and with elevation values extracted from NGS geodetic monuments. They are visually evaluated by converting to UTM-zone coordinates (units of meters horizontally and vertically) and then creating a slope grid to identify gridding artifacts in the DEMs.
            1 2009-12-01T00:00:00 NOAA's VDatum transformation tool is used to derive an NAVD 88-to-MHW conversion grid. This grid is then added to the NAVD 88 DEM to create a MHW DEM.
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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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