Metadata Identifier: gov.noaa.ngdc.mgg.dem:4270

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 Unalaska, Alaska 8/15 Arc-second MHHW Coastal Digital Elevation Model NOAA's National Geophysical Data Center (NGDC) is building high-resolution digital elevation models (DEMs) to support individual coastal States as part of the National Tsunami Hazard Mitigation Program's (NTHMP) efforts to improve community preparedness and hazard mitigation. These integrated bathymetric-topographic DEMs are used to support tsunami and coastal inundation mapping. 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 various vertical and horizontal datums depending on the specific modeling requirements of each State. For specific datum information on each DEM, refer to the appropriate DEM documentation. Cell sizes also vary depending on the specification required by modelers in each State, but typically range from 8/15 arc-second (~16 meters) to 8 arc-seconds (~240 meters).
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SV_Identification

Count Component Title Type
1 DEM Global Mosaic ArcGIS Image Service Digital Elevation Model Global Mosaic ArcGIS Image Service ArcGIS Image Service
1 Footprints ArcGIS Map Service NCEI Digital Elevation Model Extents ArcGIS Feature Layer ArcGIS Feature Service
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CI_Citation

Count Component Title Date Citation Identifier
1 Bench Mark Data Sheet with Tidal Datum References
    2011-10-24
1 Data Stewardship Maturity Report for Unalaska, Alaska 8/15 arc-second MHHW Coastal Digital Elevation Model
    2022
1 Digital Elevation Model Global Mosaic ArcGIS Image Service
    2016-06-14
1 Digital Elevation Model of Unalaska, Alaska: Procedures, Data Sources, and Analysis
    2012-10-16
1 Electronic Navigational Charts
    2010-08-16
1 GCMD Data Center Keywords Global Change Master Directory (GCMD) Data Center Keywords
    2020-01-09
1 Global Change Master Directory (GCMD) Location Keywords
    1 Global Change Master Directory (GCMD) Platform Keywords
      1 GCMD Project Keywords Global Change Master Directory (GCMD) Project Keywords
        2020-01-09
      1 Global Change Master Directory (GCMD) Science Keywords
        2 NASA/Global Change Master Directory (GCMD) Earth Science Services Keywords Global Change Master Directory (GCMD) Service Keywords
          2020-01-09
        1 Global Change Master Directory (GCMD) Vertical Data Resolution Keywords
          1 Mean Higher High Water height
            2012-08-05
          1 NCEI Digital Elevation Model Extents ArcGIS Feature Layer
            2022-10-24
          1 NGDC Multibeam Surveys
            2012-07-19
          1 NOS Hydrographic Surveys
            2008-01-01
          1 NTHMP DEM Project
            2009-12-01
          1 Shuttle Radar Topography Mission (SRTM)
            2012-07-27
          1 The Scientific Data Stewardship Maturity Assessment Model Template
            2015-06-23
          		doi:10.10.6084/m9.figshare.1211954
          1 U.S. Army Corps of Engineers (USACE)
            2012-07-27
          1 UAF Unalaska GPS
            2011-09-22
          1 Unalaska Topographic Contours
            2012-07-25
          1 Unalaska, Alaska 8/15 Arc-second MHHW Coastal Digital Elevation Model
            2012-10-16
          1 Unalaska_AK_8_15s_MHHW_DEM
            2016-06-22
          2 Uncontrolled
            1 World Geodetic System 1984
              2007-08-27
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            CI_Series

            Count Component Name Issue Identification Page
            1 NTHMP DEMs Unalaska, Alaska 8/15 arc-second
            1 NTHMP DEMs Named by primary coastal city, state in DEM.
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            CI_ResponsibleParty

            Count Component Individual Organization Position Email Role Linkage
            2 resourceProvider https://epsg.org/crs_4326/WGS-84.html
            10 https://doi.org/10.25923/80s8-7q41
            1 Barry W. Eakins originator
            1 Barry Eakins Barry W. Eakins NOAA National Centers for Environmental Information Research Scientist Barry.Eakins@noaa.gov pointOfContact
            1 City of Unalaska, Alaska originator
            9 DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, Department of Commerce publisher https://www.ncei.noaa.gov/products/coastal-elevation-models
            1 DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce publisher
            3 DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce publisher
            4 DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce originator
            1 DOC/NOAA/NOS National Ocean Service, NOAA, U.S. Department of Commerce originator
            1 DOC/NOAA/NOS/OCS > Office of Coast Survey, National Ocean Service, NOAA, U.S. Department of Commerce originator
            2 EPSG Registry European Petroleum Survey Group publisher https://epsg.org/home.html
            1 Kelly Carignan Kelly Carignan NOAA National Centers for Environmental Information kelly.carignan@noaa.gov pointOfContact
            1 Kelly S. Caringan originator
            1 Lisa A. Taylor originator
            1 Matthew R. Love originator
            1 NASA > National Aeronautics and Space Administration originator
            4 GCMD Landing Page NASA Goddard Space Flight Center, Earth Science Data and Information System custodian https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords
            2 NCEI GIS Team NCEI GIS Team NOAA National Centers for Environmental Information ncei.gis@noaa.gov pointOfContact
            1 NOAA Institutional Repository publisher
            3 DEM Info NOAA National Centers for Environmental Information DEM Information dem.info@noaa.gov pointOfContact
            1 NCEI (publisher) NOAA National Centers for Environmental Information publisher
            1 Anna Milan NOAA National Centers for Environmental Information Metadata Specialist editor
            1 National Tsunami Hazard Mitigation Program (NTHMP) originator
            1 Peng, Ge CICS-NC/NCEI author
            1 U.S. Army Corps of Engineers (USACE) originator
            1 University of Alaska at Fairbanks originator
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            CI_OnlineResource

            Count Component Linkage Name Description Function
            1
            1 http://www.nauticalcharts.noaa.gov/mcd/enc/index.htm OCS Electronic Navigational Charts Digital database of NOAA nautical chart information. download
            1 https://doi.org/10.25923/80s8-7q41 DSMR Publication at the NOAA Institutional Repository Report documenting the Scientific Data Stewardship Maturity for this dataset. information
            1 https://doi.org/10.6084/m9.figshare.1211954 The Scientific Data Stewardship Maturity Assessment Model Template Landing page for quality evaluation procedure. information
            1 https://epsg.org/crs_4326/WGS-84.html WGS 84 GML of World Geodetic System 1984 coordinate reference system. information
            1 https://epsg.org/crs_5869/MHHW-height.html MHHW height GML for mean higher high water vertical coordinate reference system (in meters) available from the epsg-registry. information
            2 https://epsg.org/home.html European Petroleum Survey Group Geodetic Parameter Registry Registry that accesses the EPSG Geodetic Parameter Dataset, which is a structured dataset of Coordinate Reference Systems and Coordinate Transformations. search
            1 https://gis.ngdc.noaa.gov/arcgis/rest/services/DEM_mosaics/DEM_global_mosaic/ImageServer DEM Global Mosaic (Elevation Values) ArcGIS Image Service REST endpoint for DEM Global Mosaic (Elevation Values) ArcGIS Image Service search
            1 https://gis.ngdc.noaa.gov/arcgis/rest/services/DEM_mosaics/DEM_global_mosaic_hillshade/ImageServer DEM Global Mosaic (Color Shaded Relief) ArcGIS Image Service This service provides a color shaded relief visualization of the data. The elevations/depths are displayed using this color ramp: https://gis.ngdc.noaa.gov/viewers/images/dem_color_scale.png. search
            1 https://gis.ngdc.noaa.gov/arcgis/services/DEM_mosaics/DEM_global_mosaic_hillshade/ImageServer/WMSServer?request=GetCapabilities&service=WMS DEM Global Mosaic (Color Shaded Relief) WMS Capabilities document for Open Geospatial Consortium Web Map Service for DEM Global Mosaic (Color Shaded Relief) search
            1 https://lta.cr.usgs.gov/SRTM1Arc Shuttle Radar Topography Mission global topography download
            1 https://noaa.maps.arcgis.com/home/item.html?id=0afa88a1701749dbbf76fcadca4f77f3 NOAA GeoPlatform Entry for NCEI Digital Elevation Model (DEM) Extents NOAA GeoPlatform listing for NCEI Digital Elevation Model (DEM) Extents information
            2 https://noaa.maps.arcgis.com/home/item.html?id=c876e3c96a8642ab8557646a3b4fa0ff NOAA GeoPlatform Entry for DEM Global Mosaic (Elevation Values) NOAA GeoPlatform listing for DEM Global Mosaic (Elevation Values) information
            2 https://noaa.maps.arcgis.com/home/item.html?id=e11ebaeb19544bb18c2afe440f063062 NOAA GeoPlatform Entry for DEM Global Mosaic (Color Shaded Relief) Shaded relief visualization of a global seamless bathymetry/topography mosaic of digital elevation models at NOAA/NCEI. information
            2 https://noaa.maps.arcgis.com/home/item.html?id=e9ba2e7afb7d46cd878b34aa3bfce042 Digital Elevation Models Mosaic (Individual DEMs) An image service providing access to bathymetric/topographic digital elevation models stewarded at NOAA's National Centers for Environmental Information. Either individual DEMs or small subsets can be accessed through this service. search
            1 https://services2.arcgis.com/C8EMgrsFcRFL6LrL/arcgis/rest/services/ncei_dem_extents/FeatureServer NCEI Digital Elevation Model (DEM) Extents ArcGIS Feature Service REST endpoint for NCEI Digital Elevation Model (DEM) Extents ArcGIS Feature Service search
            1 https://tidesandcurrents.noaa.gov/stations.html Tides and Currents Station Selection Bench Mark Data Sheet for station 9462620 information
            4 https://www.earthdata.nasa.gov/learn/find-data/idn/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
            2 DEM Map Search https://www.ncei.noaa.gov/maps/bathymetry/ Bathymetric Data Viewer The Bathymetric Data Viewer is an interactive map providing discovery, descriptions, and download capability for bathymetric survey data and digital elevation models archived at NOAA's National Centers for Environmental Information (NCEI). search
            2 https://www.ncei.noaa.gov/products/coastal-elevation-models Coastal Elevation Models at NCEI information
            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
            1 https://www.ngdc.noaa.gov/mgg/bathymetry/multibeam.html NGDC Multibeam Survey Database Digital database of NGDC multibeam surveys. download
            1 DEM text search https://www.ngdc.noaa.gov/mgg/coastal DEM text search Text search for locating completed and planned DEMs. search
            1 https://www.ngdc.noaa.gov/mgg/dat/dems/regional_tr/unalaska_815_mhhw_2012.pdf Digital Elevation Model of Unalaska, Alaska: Procedures, Data Sources and Analysis Report describing the development of the Unalaska DEM download
            1 https://www.ngdc.noaa.gov/thredds/dodsC/regional/unalaska_815_mhhw_2012.nc.html OPeNDAP Dataset Access Form OPeNDAP Dataset Access Form download
            1 https://www.ngdc.noaa.gov/thredds/fileServer/regional/unalaska_815_mhhw_2012.nc Download NetCDF File Download NetCDF File download
            1 https://www.ngdc.noaa.gov/thredds/ncml/regional/unalaska_815_mhhw_2012.nc?catalog=https%3A%2F%2Fwww.ngdc.noaa.gov%2Fthredds%2Fcatalog%2Fregional%2Fcatalog.html&dataset=regionalDatasetScan%2Funalaska_815_mhhw_2012.nc NetCDF Markup Language file NetCDF Markup Language file information
            1 https://www.ngdc.noaa.gov/thredds/ncss/regional/unalaska_815_mhhw_2012.nc/dataset.html Download a subset of the NetCDF Download a subset of the NetCDF download
            1 https://www.ngdc.noaa.gov/thredds/wcs/regional/unalaska_815_mhhw_2012.nc?service=WCS&version=1.0.0&request=GetCapabilities Web Coverage Service GetCapabilities Web Coverage Service GetCapabilities information
            1 https://www.ngdc.noaa.gov/thredds/wms/regional/unalaska_815_mhhw_2012.nc?service=WMS&version=1.3.0&request=GetCapabilities Web Map Service GetCapabilities Web Map Service GetCapabilities information
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            MD_Identifier or RS_Identifier

            Count Component Code
            1 Digital Elevation Model
            1 MHHW
            1 MM-Stew
            1 NTHMP DEM Gridding Project
            1 doi:10.10.6084/m9.figshare.1211954
            1 urn:ogc:def:crs:EPSG::4326
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            EX_Extent

            Bounding Box Temporal Extent
            Count Component Description West East North South Start End
            1 -166.66 -166.42 53.95 53.80 1934-01-01 2012-08-01
            2 -180 180 90 -90
            1
            1
            1
            1 2002-01-01 2010-01-01
            1
            1
            1 1997-01-01 2001-01-01
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            EX_GeographicBoundingBox

            Count Component West East North South
            1 -166.66 -166.42 53.95 53.80
            2 -180 180 90 -90
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            EX_TemporalExtent

            Count Component Start End
            1 1934-01-01 2012-08-01
            5
            1 2002-01-01 2010-01-01
            1 1997-01-01 2001-01-01
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            MD_Format

            Count Component Name Version specification
            1 netCDF 4 Classic netCDF 4 Classic
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            MD_Medium

            none found
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            MD_Constraints

            Count Component Use Limitation
            1 not for navigation Not to be used for navigation. Although these data are of high quality and useful for planning and modeling purposes, they are not suitable for navigation. For navigation, please refer to the NOS nautical chart series.
            1 copyright statement Produced by the NOAA National Centers for Environmental Information. Not subject to copyright protection within the United States.
            1 These data not to be used for navigation. Although these data are of high quality and useful for planning and modeling purposes, they are not suitable for navigation. For official navigation products, please refer to the U.S. nautical charts available from the NOAA Office of Coast Survey: http://www.nauticalcharts.noaa.gov.
            1 These data not to be used for navigation. Although these data are of high quality and useful for planning and modeling purposes, they are not suitable for navigation. For official navigation products, please refer to the U.S. nautical charts available from the NOAA Office of Coast Survey: https://www.nauticalcharts.noaa.gov.
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            MD_ReferenceSystem

            Count Component Code Authority Title
            1 MHHW MHHW Mean Higher High Water height
            1 WGS84 urn:ogc:def:crs:EPSG::4326 World Geodetic System 1984
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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 1013
            1 column 1620
            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 Data Stewardship Maturity Report for Unalaska, Alaska 8/15 arc-second MHHW Coastal Digital Elevation Model crossReference
            1 Digital Elevation Model of Unalaska, Alaska: Procedures, Data Sources, and Analysis crossReference
            1 NTHMP DEM Project largerWorkCitation
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            LE_Source or LI_Source

            Count Component Title Date Description
            1 Bench Mark Data Sheet with Tidal Datum References 2011-10-24 tidal information table from which vertical datum adjustment information are interpreted
            1 Electronic Navigational Charts 2010-08-16 bathymetric sounding data
            1 NGDC Multibeam Surveys 2012-07-19 Multibeam swath sonar surveys
            1 NOS Hydrographic Surveys 2008-01-01 Retrieved processed NOS survey data from archive
            1 Shuttle Radar Topography Mission (SRTM) 2012-07-27 Source Contribution: gridded topographic data downloaded from web site. ; Source Type: on web
            1 U.S. Army Corps of Engineers (USACE) 2012-07-27 hydrographic condition survey of harbor
            1 UAF Unalaska GPS 2011-09-22 GPS survey data obtained from UAF
            1 Unalaska Topographic Contours 2012-07-25 Topographic contour vector data
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            LE_ProcessStep or LI_ProcessStep

            Count Component DateTime Description
            1 2012-06-26T00:00:00 All datasets obtained by NGDC were converted to common horizontal and vertical datums of WGS84 geographic and Mean Higher High Water, respectively, using FME. They were also converted to common file format, ESRI point shapefiles, for visualization and inspection.
            1 2012-07-03T00:00:00 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 2012-07-26T00:00:00 xyz files of the bathymetric data were surfaced using GMT's 'surface' tool onto a 1/3 arc-second grid that interpolated to fill empty cells. Points extracted every 5 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 2012-08-02T00:00:00 xyz files for each input dataset were 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 was given to more recent, higher-accuracy datasets.
            1 2015-04-22T00:00:00 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.
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            MI_Operation

            Count Component Code Type Status Description
            1 NTHMP DEM 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
            1 Sound Navigation and Ranging
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