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Metadata Identifier: gov.noaa.ngdc.mgg.dem:395

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 Sand Point, Alaska Coastal Digital Elevation Model NOAA's National Geophysical Data Center (NGDC) is building high-resolution digital elevation models (DEMs) for select U.S. coastal regions. These integrated bathymetric-topographic DEMs are used to support tsunami forecasting and warning efforts at the NOAA Center for Tsunami Research, Pacific Marine Environmental Laboratory (PMEL). The DEMs are part of the tsunami forecast system SIFT (Short-term Inundation Forecasting for Tsunamis) currently being developed by PMEL for the NOAA Tsunami Warning Centers, and are used in the MOST (Method of Splitting Tsunami) model developed by PMEL to simulate tsunami generation, propagation, and inundation. Bathymetric, topographic, and shoreline data used in DEM compilation are obtained from various sources, including NGDC, the U.S. National Ocean Service (NOS), the U.S. Geological Survey (USGS), the U.S. Army Corps of Engineers (USACE), the Federal Emergency Management Agency (FEMA), and other federal, state, and local government agencies, academic institutions, and private companies. DEMs are referenced to the vertical tidal datum of Mean High Water (MHW) and horizontal datum of World Geodetic System 1984 (WGS84). Grid spacings for the DEMs range from 1/3 arc-second (~10 meters) to 3 arc-seconds (~90 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 Digital Elevation Models of Sand Point, Alaska: Procedures, Data Sources, and Analysis
    2008-01-01
1 Global Change Master Directory (GCMD) Location Keywords
    1 GCMD Project Keywords Global Change Master Directory (GCMD) Project Keywords
      2017-04-24
    1 Global Change Master Directory (GCMD) Science and Services Keywords
      1 Measured and Estimated Seafloor Topography
        1997-09-26
      1 NASA/GCMD Data Resolution Keywords
        1 NASA/GCMD Platform Keywords
          1 NOAA Tsunami Inundation Gridding Project
            2008-10-31
          1 NOS Hydrographic Surveys
            2008-01-01
          1 NOS Unpublished Multibeam Swath Sonar Surveys
            2006-01-01
          1 NOS unpublished hydrographic LiDAR Surveys
            2008-01-01
          1 Sand Point, Alaska Coastal Digital Elevation Model
            2006-09-29
          1 Shuttle Radar Topography Mission (SRTM)
            2008-01-01
          1 USGS NED topography
            2008-01-01
          2 Uncontrolled
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            CI_Series

            Count Component Name Issue Identification Page
            1 NOAA Technical Memorandum NESDIS NGDC-5
            1 NOAA Tsunami Inundation DEM Sand Point, Alaska 3 arc-second
            1 NOAA Tsunami Inundation DEMs Named by primary coastal city, state in DEM.
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            CI_ResponsibleParty

            Count Component Individual Organization Position Email Role Linkage
            7 GCMD Landing Page https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
            1 Barry W. Eakins originator
            3 DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce publisher
            3 DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce originator
            2 DOC/NOAA/NOS > National Ocean Service, NOAA, U.S. Department of Commerce originator
            1 DOC/NOAA/OAR/PMEL/NCTR > NOAA Center for Tsunami Research, Pacific Marine Environmental Laboratory, OAR, NOAA, U.S. Department of Commerce originator
            1 DOI/USGS > U.S. Geological Survey, Department of the Interior originator
            1 David C. Schoolcraft originator
            1 George F. Sharman originator
            1 Kelly S. Carignan originator
            1 Lisa A. Taylor originator
            1 NASA > National Aeronautics and Space Administration originator
            1 Robin R. Warnken originator
            1 Smith, W. H. F., and D. T. Sandwell - University of California, San Diego (UCSD) originator
            1 Tatiana Sazonova 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]
            Barry Eakins 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
            1 http://ned.usgs.gov/ USGS National Elevation Dataset Digital database of U.S. topography, in raster form (DEM) download
            1 http://topex.ucsd.edu/marine_topo/mar_topo.html Measured and Estimated Seafloor Topography global digital gridded data download
            1 https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-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://lta.cr.usgs.gov/SRTM1Arc Shuttle Radar Topography Mission global topography download
            1 https://www.ngdc.noaa.gov/mgg/bathymetry/hydro.html NOS Hydrographic Survey Database Digital database of NOS hydrographic surveys that date back to the late 19th century. download
            Unresolved Xlinks
            DEM text search at: /gmi:MI_Metadata/gmd:distributionInfo[1]/gmd:MD_Distribution[1]/gmd:transferOptions[1]/gmd:MD_DigitalTransferOptions[1]/gmd:onLine[1]
            DEM map search at: /gmi:MI_Metadata/gmd:distributionInfo[1]/gmd:MD_Distribution[1]/gmd:transferOptions[2]/gmd:MD_DigitalTransferOptions[1]/gmd:onLine[1]
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            MD_Identifier or RS_Identifier

            Count Component Code
            1 Digital Elevation Model
            1 Tsunami Inundation Gridding Project
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            EX_Extent

            Bounding Box Temporal Extent
            Count Component Description West East North South Start End
            1 -161.00 -159.80 55.70 54.70 1913-01-01 2006-01-01
            1 1913-01-01 1955-01-01
            1 2003-01-01 2005-01-01
            1
            1
            1
            1
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            EX_GeographicBoundingBox

            Count Component West East North South
            1 -161.00 -159.80 55.70 54.70
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            EX_TemporalExtent

            Count Component Start End
            1 1913-01-01 2006-01-01
            1 1913-01-01 1955-01-01
            1 2003-01-01 2005-01-01
            4
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            MD_Format

            none found
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            MD_Medium

            none found
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            MD_Constraints

            Count Component Use Limitation
            1 copyright statement Produced by the NOAA National Geophysical Data Center. Not subject to copyright protection within the United States.
            Unresolved Xlinks
            not for navigation at: /gmi:MI_Metadata/gmd:identificationInfo[1]/gmd:MD_DataIdentification[1]/gmd:resourceConstraints[1]
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            MD_ReferenceSystem

            Unresolved Xlinks
            WGS84 at: /gmi:MI_Metadata/gmd:referenceSystemInfo[1]
            MHW at: /gmi:MI_Metadata/gmd:referenceSystemInfo[2]
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            MD_GridSpatialRepresentation

            Count Component Number of Dimensions Cell Geometry Code
            1 3 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 1201
            1 column 1441
            1 vertical 1
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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

            Count Component Title Code Association Type Code
            1 Digital Elevation Models of Sand Point, Alaska: Procedures, Data Sources, and Analysis crossReference
            1 NOAA Tsunami Inundation Gridding Project largerWorkCitation
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            LE_Source or LI_Source

            Count Component Title Date Description
            1 Measured and Estimated Seafloor Topography 1997-09-26 Source Contribution: global gridded DEM downloaded from web site. ; Source Type: online
            1 NOS Hydrographic Surveys 2008-01-01 Source Contribution: hydrographic surveys downloaded from web site. ; Source Type: online
            1 NOS Unpublished Multibeam Swath Sonar Surveys 2006-01-01 Source Contribution: Multibeam bathymetric surveys provided by NOS Pacific Hydrographic Branch. ; Source Type: digital file
            1 NOS unpublished hydrographic LiDAR Surveys 2008-01-01 Source Contribution: coastal bathymetric-topographic LiDAR surveys provided by NOS Pacific Hydrographic Branch. ; Source Type: digital file
            1 Shuttle Radar Topography Mission (SRTM) 2008-01-01 Source Contribution: gridded topographic data downloaded from web site. ; Source Type: online
            1 USGS NED topography 2008-01-01 Source Contribution: gridded topographic data ; Source Type: online
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            LE_ProcessStep or LI_ProcessStep

            Count Component DateTime Description
            1 2006-08-01T00:00:00 All datasets obtained by NGDC were converted to common horizontal and vertical datums of WGS84 geographic and Mean High Water, respectively, using FME. They were also converted to common file format, ESRI point shapefiles, for visualization and inspection.
            Barry Eakins 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 2006-08-15T00:00:00 Datasets were visually inspected with ArcGIS for identification and editing of data anomalies. Datasets were then compared with overlapping datasets to ensure data consistency.
            1 2006-08-22T00:00:00 xyz files of the bathymetric data were surfaced using GMT's 'surface' tool onto a 1 arc-second grid that interpolated to fill empty cells. Points extracted every 10 meters along the coastline were also included to ensure that the bathymetric grid reached zero at the coast. The resulting Arc ASCII grid was imported into ArcGIS and clipped to the coastline to remove values over land.
            1 2006-08-24T00:00:00 The DEM was quantitatively evaluated by comparing with source datasets and with elevation values extracted from NGS geodetic monuments. It was 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 DEM. It was also compared to 1/3 arc-second DEM to ensure elevation consistency.
            1 2006-08-31T00:00:00 xyz files for each dataset were combined into a single file, which was smoothed using GMT's 'blockmedian' tool to a 3 arc-second grid 5% larger than the final 3 arc-second DEM. GMT's 'surface' tool then applied a tight spline tension to interpolate cells without data values.
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            MI_Operation

            Count Component Code Type Status Description
            1 Tsunami Inundation Gridding Project
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            MI_Platform

            Count Component Code Description
            1 Digital Elevation Model
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            MI_Instrument

            Count Component Code Type Description
            3 Light Detection and Ranging
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