Port Lions, Alaska 8/15 arc-second MHHW Coastal Digital Elevation ModelDigital Elevation Model Global Mosaic ArcGIS Image ServiceDigital Elevation Model Footprints ArcGIS Map Service

Dataset Identification:

Resource Abstract:
NOAA's National Centers for Environmental Information 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).
Citation
Title Port Lions, Alaska 8/15 arc-second MHHW Coastal Digital Elevation Model
publication  Date   2016-08-26
Edition First
presentationForm  mapDigital
Series
Name NTHMP DEMs
Issue Port Lions, Alaska 8/15 arc-second
cited responsible party - publisher
organisation Name  DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
cited responsible party - originator
organisation Name  DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
Contact information
Telephone
Voice 303-497-6826
Fax 303-497-6513
Address
325 Broadway, Boulder, CO, 80305-3328 Country USA
electronic Mail Address ngdc.info@noaa.gov
cited responsible party - originator
organisation Name  DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
cited responsible party - collaborator
organisation Name  National Tsunami Hazard Mitigation Program (NTHMP)
Topic Category:  elevation
Keywords:
Theme keywords (theme):
Earth Science > Oceans > Bathymetry/Seafloor Topography > Seafloor Topography
Earth Science > Oceans > Bathymetry/Seafloor Topography > Bathymetry
Earth Science > Oceans > Bathymetry/Seafloor Topography > Water Depth
Earth Science > Land Surface > Topography > Terrain Elevation > Topographical Relief Maps
Earth Science > Oceans > Coastal Processes > Coastal Elevation
thesaurus name >
Title Global Change Master Directory (GCMD) Science and Services Keywords
platform Keywords
Models/Analyses > DEM > Digital Elevation Model
thesaurus name >
Title Global Change Master Directory (GCMD) Platform Keywords
project Keywords
ICSU-WDS > International Council for Science - World Data System
thesaurus name >
Title Global Change Master Directory (GCMD) Project Keywords
publication  Date   2018-03-28
Edition 8.6
cited responsible party - publisher
organisation Name  Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA)
Contact information
Address
, Greenbelt, MD
Linkage for online resource
name Global Change Master Directory (GCMD) Keywords
URL: https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
link function information
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.
dataResolution Keywords
1 meter - < 30 meters
thesaurus name >
Title Global Change Master Directory (GCMD) Horizontal Data Resolution Keywords
dataResolution Keywords
< 1 meter
thesaurus name >
Title Global Change Master Directory (GCMD) Vertical Data Resolution Keywords
Location keywords:
Continent > North America > United States of America >Alaska
Vertical Location > Land Surface
Vertical Location > Sea Floor
thesaurus name >
Title Global Change Master Directory (GCMD) Location Keywords
Theme keywords (theme):
Coastal Relief
Gridded elevations
Integrated bathymetry and topography
thesaurus name >
Title Uncontrolled
Location keywords:
Port Lions
Kodiak Island
Settler Cove
Alaska
Kizhuyak Bay
thesaurus name >
Title Uncontrolled
dataCenter Keywords
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
thesaurus name >
Title Global Change Master Directory (GCMD) Data Center Keywords
publication  Date   2018-03-18
Edition 8.6
cited responsible party - publisher
organisation Name  Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA)
Contact information
Address
, Greenbelt, MD
Linkage for online resource
name Global Change Master Directory (GCMD) Keywords
URL: https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
link function information
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.
purpose:
Developed for the University of Alaska at Fairbanks (UAF), Geophysical Institute for tsunami and coastal inundation modeling efforts for the State of Alaska.
Resource language:  eng; USA
Resource progress code:  completed
Resource Maintenance Information
maintenance or update frequency:  asNeeded
Constraints on resource usage:
Constraints
Use limitation statement:
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.
Constraints on resource usage:
Constraints
Use limitation statement:
Produced by the NOAA National Geophysical Data Center. Not subject to copyright protection within the United States.
Constraints on resource usage:
Legal Constraints
Access Constraints  otherRestrictions
Other constraints
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.
Spatial representation type code:  grid
Processing environment:  Native Dataset Environment: Microsoft Windows 2008 Service Pack 1; ESRI ArcGIS 10.1.1.3143
Resource extent
Extent description
ISO valid extents for Port Lions 8/15 sec. DEM
Geographic Extent
Geographic Bounding Box
westBoundLongitude  -152.92
eastBoundLongitude  -152.82
northBoundLatitude  57.90
southBoundLatitude  57.84
point of contact - pointOfContact
organisation Name  DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
position Name DEM Information
Contact information
Address
electronic Mail Address dem.info@noaa.gov
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Service Identification information: 1

Resource Abstract:
The DEM Global Mosaic is an image service providing access to bathymetric/topographic digital elevation models stewarded at NOAA's National Centers for Environmental Information (NCEI), along with the global GEBCO_2014 grid: http://www.gebco.net/data_and_products/gridded_bathymetry_data. NCEI builds and distributes high-resolution, coastal digital elevation models (DEMs) that integrate ocean bathymetry and land topography to support NOAA's mission to understand and predict changes in Earth's environment, and conserve and manage coastal and marine resources to meet our Nation's economic, social, and environmental needs. They can be used for modeling of coastal processes (tsunami inundation, storm surge, sea-level rise, contaminant dispersal, etc.), ecosystems management and habitat research, coastal and marine spatial planning, and hazard mitigation and community preparedness. This service is a general-purpose global, seamless bathymetry/topography mosaic. It combines DEMs from a variety of near sea-level vertical datums, such as mean high water (MHW), mean sea level (MSL), and North American Vertical Datum of 1988 (NAVD88). Elevation values have been rounded to the nearest meter, with DEM cell sizes going down to 1 arc-second. Higher-resolution DEMs, with greater elevation precision, are available in the companion NAVD88: http://noaa.maps.arcgis.com/home/item.html?id=e9ba2e7afb7d46cd878b34aa3bfce042 and MHW: http://noaa.maps.arcgis.com/home/item.html?id=3bc7611c1d904a5eaf90ecbec88fa799 mosaics. By default, the DEMs are drawn in order of cell size, with higher-resolution grids displayed on top of lower-resolution grids. If overlapping DEMs have the same resolution, the newer one is shown. Please see NCEI's corresponding DEM Footprints map service: http://noaa.maps.arcgis.com/home/item.html?id=d41f39c8a6684c54b62c8f1ab731d5ad for polygon footprints and more information about the individual DEMs used to create this composite view. In this visualization, the elevations/depths are displayed using this color ramp: http://gis.ngdc.noaa.gov/viewers/images/dem_color_scale.png.
Citation
Title Digital Elevation Model Global Mosaic ArcGIS Image Service
creation  Date   2016-06-14
cited responsible party - publisher
organisation Name  DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, Department of Commerce
Contact information
Linkage for online resource
name Integrated Models of Coastal Relief at NCEI
URL: https://ngdc.noaa.gov/mgg/coastal/coastal.html
protocol HTTPS
link function information
cited responsible party - publisher
organisation Name  DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, Department of Commerce
Contact information
Linkage for online resource
name NOAA GeoPlatform Entry for DEM Global Mosaic (Elevation Values)
URL: https://noaa.maps.arcgis.com/home/item.html?id=c876e3c96a8642ab8557646a3b4fa0ff
protocol HTTPS
link function information
Description NOAA GeoPlatform listing for DEM Global Mosaic (Elevation Values)
cited responsible party - publisher
organisation Name  DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, Department of Commerce
Contact information
Linkage for online resource
name NOAA GeoPlatform Entry for DEM Global Mosaic (Color Shaded Relief)
URL: https://noaa.maps.arcgis.com/home/item.html?id=feb3c625dc094112bb5281c17679c769
protocol HTTPS
link function information
Description Shaded relief visualization of a global seamless bathymetry/topography mosaic of digital elevation models at NOAA/NCEI.
Keywords:
Theme keywords (theme):
DATA ANALYSIS AND VISUALIZATION > GEOGRAPHIC INFORMATION SYSTEMS > WEB-BASED GEOGRAPHIC INFORMATION SYSTEMS
DATA MANAGEMENT/DATA HANDLING > DATA SEARCH AND RETRIEVAL
DATA ANALYSIS AND VISUALIZATION > VISUALIZATION/IMAGE PROCESSING
thesaurus name >
Title Global Change Master Directory (GCMD) Service Keywords
publication  Date   2018-03-15
Edition 8.6
cited responsible party - publisher
organisation Name  Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA)
Contact information
Address
, Greenbelt, MD
Linkage for online resource
name Global Change Master Directory (GCMD) Keywords
URL: https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
link function information
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.
Service type: ArcGIS Image Service
Service type verstion 10.3
Constraints on resource usage:
Constraints
Use limitation statement:
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.
Resource extent
Geographic Extent
Geographic Bounding Box
extent Type Code  1
westBoundLongitude  -180
eastBoundLongitude  180
northBoundLatitude  90
southBoundLatitude  -90
point of contact - pointOfContact
individual Name Jesse Varner
organisation Name  DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
Contact information
Address
electronic Mail Address Jesse.Varner@noaa.gov
Coupling between service and dataset:  tight
Service operations:
Operation name: ArcGIS for Server REST endpoint for image service (Elevation Values)
Linkage for online resource
name DEM Global Mosaic (Elevation Values) ArcGIS Image Service
URL: https://gis.ngdc.noaa.gov/arcgis/rest/services/DEM_global_mosaic/ImageServer
protocol ESRI:ArcGIS
link function search
Description REST endpoint for DEM Global Mosaic (Elevation Values) ArcGIS Image Service
target application profile  ESRI image rest
Service operations:
Operation name: ArcGIS for Server REST endpoint for image service (Color Shaded Relief)
Linkage for online resource
name DEM Global Mosaic (Color Shaded Relief) ArcGIS Image Service
URL: https://gis.ngdc.noaa.gov/arcgis/rest/services/DEM_global_mosaic_hillshade/ImageServer
protocol ESRI:ArcGIS
link function search
Description 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.
target application profile  ESRI Image Rest Specification
Service operations:
Operation name: WMS Get Capabilities
Linkage for online resource
name DEM Global Mosaic (Color Shaded Relief) WMS
URL: https://gis.ngdc.noaa.gov/arcgis/services/DEM_global_mosaic_hillshade/ImageServer/WMSServer?request=GetCapabilities&service=WMS
protocol OGC:WMS
link function search
Description Capabilities document for Open Geospatial Consortium Web Map Service for DEM Global Mosaic (Color Shaded Relief)
target application profile  http://opengis.net/spec/wms
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Service Identification information: 1

Resource Abstract:
A map service showing the location and coverage of land and seafloor digital elevation models (DEMs) available from NOAA's National Centers for Environmental Information (NCEI). NCEI builds and distributes high-resolution, coastal digital elevation models (DEMs) that integrate ocean bathymetry and land topography to support NOAA's mission to understand and predict changes in Earth's environment, and conserve and manage coastal and marine resources to meet our Nation's economic, social, and environmental needs. They can be used for modeling of coastal processes (tsunami inundation, storm surge, sea-level rise, contaminant dispersal, etc.), ecosystems management and habitat research, coastal and marine spatial planning, and hazard mitigation and community preparedness. Layers available in the map service: Layers 1-4: DEMs by Category (includes various DEMs, both hosted at NCEI, and elsewhere on the web); Layers 6-11: NCEI DEM Projects (DEMs hosted at NCEI, color-coded by project); Layer 12: All NCEI Bathymetry DEMs (All bathymetry or bathy-topo DEMs hosted at NCEI).
Citation
Title Digital Elevation Model Footprints ArcGIS Map Service
creation  Date   2011-02-15
cited responsible party - publisher
organisation Name  DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, Department of Commerce
Contact information
Linkage for online resource
name Integrated Models of Coastal Relief at NCEI
URL: https://ngdc.noaa.gov/mgg/coastal/coastal.html
protocol HTTPS
link function information
cited responsible party - publisher
organisation Name  DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, Department of Commerce
Contact information
Linkage for online resource
name NOAA GeoPlatform Entry for Digital Elevation Model Footprints
URL: https://noaa.maps.arcgis.com/home/item.html?id=d41f39c8a6684c54b62c8f1ab731d5ad
protocol HTTPS
link function information
Description NOAA GeoPlatform listing for Digital Elevation Model Footprints ArcGIS Map Service
cited responsible party - publisher
organisation Name  DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, Department of Commerce
Contact information
Linkage for online resource
name DEM Global Mosaic (Color Shaded Relief)
URL: https://gis.ngdc.noaa.gov/arcgis/rest/services/DEM_global_mosaic_hillshade/ImageServer
protocol ESRI:ArcGIS
link function search
Description Color shaded relief visualization of a global seamless bathymetry/topography mosaic of digital elevation models at NOAA/NCEI.
cited responsible party - publisher
organisation Name  DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, Department of Commerce
Contact information
Linkage for online resource
name DEM Global Mosaic (Elevation Values)
URL: http://gis.ngdc.noaa.gov/arcgis/rest/services/DEM_global_mosaic/ImageServer
protocol ESRI:ArcGIS
link function search
Description A global seamless bathymetry/topography mosaic of digital elevation models at NOAA/NCEI.
Keywords:
Theme keywords (theme):
DATA ANALYSIS AND VISUALIZATION > GEOGRAPHIC INFORMATION SYSTEMS > WEB-BASED GEOGRAPHIC INFORMATION SYSTEMS
DATA MANAGEMENT/DATA HANDLING > DATA SEARCH AND RETRIEVAL
DATA ANALYSIS AND VISUALIZATION > VISUALIZATION/IMAGE PROCESSING
thesaurus name >
Title Global Change Master Directory (GCMD) Service Keywords
publication  Date   2018-03-15
Edition 8.6
cited responsible party - publisher
organisation Name  Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA)
Contact information
Address
, Greenbelt, MD
Linkage for online resource
name Global Change Master Directory (GCMD) Keywords
URL: https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
link function information
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.
Service type: ArcGIS Map Service
Service type verstion 10.3
Constraints on resource usage:
Constraints
Use limitation statement:
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.
Resource extent
Geographic Extent
Geographic Bounding Box
extent Type Code  1
westBoundLongitude  -180
eastBoundLongitude  180
northBoundLatitude  90
southBoundLatitude  -90
point of contact - pointOfContact
individual Name Jesse Varner
organisation Name  DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
Contact information
Address
electronic Mail Address Jesse.Varner@noaa.gov
Coupling between service and dataset:  tight
Service operations:
Operation name: ArcGIS for Server REST endpoint for dynamic map service
Linkage for online resource
name Digital Elevation Model Footprints ArcGIS Dynamic Map Service
URL: https://maps.ngdc.noaa.gov/arcgis/rest/services/web_mercator/dem_extents/MapServer
protocol HTTPS
link function search
Description REST endpoint for Digital Elevation Model Footprints ArcGIS dynamic map service
target application profile  ESRI Map Rest Specification
Service operations:
Operation name: WMS Get Capabilities
Linkage for online resource
name Digital Elevation Model Footprints Web Map Service (WMS)
URL: https://maps.ngdc.noaa.gov/arcgis/services/web_mercator/dem_extents/MapServer/WMSServer?request=GetCapabilities&service=WMS
protocol OGC:WMS
link function search
Description Capabilities document for Open Geospatial Consortium Web Map Service for Digital Elevation Model Footprints
target application profile  http://opengis.net/spec/wms
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Grid spatial representation

number of grid dimensions: 3
Grid axis property:
Grid Dimension
Dimension Name:  row
Dimension Size 405
resolution
Distance 0.00014814815 decimalDegrees
Grid Dimension
Dimension Name:  column
Dimension Size 675
resolution
Distance 0.00014814815 decimalDegrees
Grid Dimension
Dimension Name:  vertical
Dimension Size 1
cell geometry type:  area
transformation parameter availability:  true
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reference system 1

Reference System Identifier
Identifier string: urn:ogc:def:crs:EPSG::4326
authority
Title World Geodetic System 1984
alternateTitle  WGS 84
revision  Date   2007-08-27
cited responsible party - resourceProvider
organisation Name  
Contact information
Linkage for online resource
name WGS 84
URL: http://www.epsg-registry.org/export.htm?gml=urn:ogc:def:crs:EPSG::4326
link function information
Description GML of World Geodetic System 1984 coordinate reference system.
cited responsible party - publisher
organisation Name  European Petroleum Survey Group
Contact information
Linkage for online resource
name European Petroleum Survey Group Geodetic Parameter Registry
URL: http://www.epsg-registry.org/
link function search
Description Registry that accesses the EPSG Geodetic Parameter Dataset, which is a structured dataset of Coordinate Reference Systems and Coordinate Transformations.
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reference system 2

Reference System Identifier
Identifier string: MHHW
authority
Title Mean Higher High Water height
alternateTitle  MHHW height
revision  Date   2012-08-05
cited responsible party - resourceProvider
organisation Name  
Contact information
Linkage for online resource
name MHHW height
URL: http://www.epsg-registry.org/export.htm?gml=urn:ogc:def:crs:EPSG::5869
link function information
Description GML for mean higher high water vertical coordinate reference system (in meters) available from the epsg-registry.
cited responsible party - publisher
organisation Name  European Petroleum Survey Group
Contact information
Linkage for online resource
name European Petroleum Survey Group Geodetic Parameter Registry
URL: http://www.epsg-registry.org/
link function search
Description Registry that accesses the EPSG Geodetic Parameter Dataset, which is a structured dataset of Coordinate Reference Systems and Coordinate Transformations.
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Scope of quality information
scope level  repository
Level Description
other component described  NOAA National Centers for Environmental Information
Resource lineage description

Scope of quality information
scope level  dataset
Resource lineage description
source
source description  NOS hydrographic survey data
source citation
Title NOS Hydrographic Surveys
publication  Date   2008-01-01
cited responsible party - originator
organisation Name  DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
cited responsible party -
position Name Citation URL
Contact information
Linkage for online resource
name NOS Hydrographic Survey Database
URL: http://www.ngdc.noaa.gov/mgg/bathymetry/hydro.html
link function download
Description Digital database of NOS hydrographic surveys that date back to the late 19th century.
Resource extent
Temporal Extent
1933-01-01 2014-01-01
source
source description  Tidal information table from which vertical datum adjustment information are interpreted
source citation
Title Bench Mark Data Sheet with Tidal Datum References
publication  Date   2014-12-30
presentationForm  documentDigital
cited responsible party - originator
organisation Name  DOC/NOAA/NOS National Ocean Service, NOAA, U.S. Department of Commerce
cited responsible party -
position Name Citation URL
Contact information
Linkage for online resource
name Tides and Currents Station Selection
URL: http://tidesandcurrents.noaa.gov/station_retrieve.shtml
link function information
Description Bench Mark Data Sheet for station # 9457391
Resource extent
Temporal Extent
2009-07-01 2009-08-01
source
source description  Gridded topographic data
source citation
Title Shuttle Radar Topography Mission 1 Arc-Second Global: SRTM1N57W153V3
publication  Date   2014-09-23
cited responsible party - originator
organisation Name  NASA > National Aeronautics and Space Administration
cited responsible party -
position Name Citation URL
Contact information
Linkage for online resource
name Shuttle Radar Topography Mission
URL: http://earthexplorer.usgs.gov/
link function download
Description The Shuttle Radar Topography Mission (SRTM) was a partnership between NASA and the National Geospatial-Intelligence Agency (NGA). Flown aboard the NASA Space Shuttle Endeavour (11-22 February 2000), SRTM fulfilled its mission to map the world in three dimensions. The USGS is under agreement with NGA and NASA's Jet Propulsion Laboratory to distribute SRTM elevation products derived from the C-band radar data. SRTM utilized interferometric C-band Spaceborne Imaging Radar to generate elevation data over 80 percent of the Earth's land surface. Global SRTM data at a resolution of 1 arc-second have been edited to delineate and flatten water bodies, better define coastlines, remove spikes and wells, and fill small voids. Larger areas of missing data or voids were filled by the NGA using interpolation algorithms in conjunction with other sources of elevation data. The SRTM 1 Arc-Second Global data offer worldwide coverage of void filled data at a resolution of 1 arc-second (30 meters) and provide open distribution of this high-resolution global data set.
Resource extent
Temporal Extent
2000-02-01
source
source description  Digitized hydrographic survey for Port Lions Harbor
source citation
Title USACE
publication  Date   2014-11-04
cited responsible party - originator
organisation Name  U.S. Army Corps of Engineers, Alaska District Constructions - Operations Division
cited responsible party -
position Name Citation URL
Contact information
Linkage for online resource
name Rivers and Harbors Project Information
URL: http://www.poa.usace.army.mil/
link function download
Description Hydrographic survey information
Resource extent
Temporal Extent
2014-09-02 2014-09-07
source
source description  GPS survey data obtained from UAF
source citation
Title UAF Port Lions GPS
publication  Date   2015-11-19
cited responsible party - originator
organisation Name  University of Alaska at Fairbanks
Resource extent
Temporal Extent
2015-11-19
source
source description  Topographic point data extracted from CAD data files
source citation
Title DCRA CAD ortho photo derived topography
publication  Date   2007-01-01
cited responsible party - originator
organisation Name  State of Alaska, Division of Community and Regional Affairs (DCRA)
Resource extent
Temporal Extent
2008-05-27
AbsoluteExternalPositionalAccuracy
name Of Measure Horizontal Positional Accuracy Report
evaluation Method Description  The horizontal accuracy of bathymetric and topographic features in the DEM is dependent upon DEM cell size and the accuracy of the input datasets used to determine corresponding cell values. Topography: 10 to 30 meters. Positional accuracy of input topographic datasets limits accuracy of corresponding cell values in DEM. SRTM topography: 15 to 30 meters, DCRA topography: ~7 meters, GPS: less than 5 meters. DEM cell-value relative-contribution factors: GPS: 1,000, DCRA: 100, SRTM: 1. Bathymetry: 15 meters. Positional accuracy of input bathymetric datasets limits accuracy of corresponding cell values in DEM. NOS survey data: from 1 meter to several kilometers, USACE digitized survey points: ~10 meters. DEM cell-value relative-contribution factors: NOS BAG survey: 1000, USACE: 1000, NOS non-bag survey: 1.
AbsoluteExternalPositionalAccuracy
name Of Measure Vertical Positional Accuracy Report
evaluation Method Description  The vertical accuracy of bathymetric and topographic features in the DEM is dependent upon the accuracy of the input datasets used to determine corresponding cell values. Topography: 10 to 30 meters. Vertical accuracy of input topographic datasets limits accuracy of corresponding cells in DEM. DEM cell-value relative-contribution factors: GPS: 1,000, DCRA: 10, SRTM: 1. Bathymetry: less than 1 meter to 5% of water depth. Vertical accuracy of input bathymetric datasets limits accuracy of corresponding cells in DEM. DEM cell-value relative-contribution factors: NOS BAG survey: 1000, USACE: 1000, NOS non-bag survey: 1. Gridding interpolation to determine cell values between sparse soundings in deep water degrades the vertical accuracy of corresponding elevations.
Completeness Commission
evaluation Method Description  NCEI made every effort to obtain all available digital topographic and bathymetric datasets in the region for use in building the DEM.
ConceptualConsistency
measure Description  Datasets were visually compared internally and externally (with other overlapping datasets and satellite images and maps) in ESRI ArcGIS for identification of anomalous elevations or data inconsistencies. Where elevation inconsistencies occurred, the most recent and/or highest resolution data set was selected for use in that region. Elevations in the older and/or lower-resolution datasets were deleted prior to building the DEM.

Resource distribution information

Distributor
distributor contact - pointOfContact
organisation Name  DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
position Name DEM Information
Contact information
Address
electronic Mail Address dem.info@noaa.gov
Format
Format name netCDF
Format version 4 Classic
Digital Transfer Options
Linkage for online resource
name OPeNDAP Dataset Access Form
URL: https://www.ngdc.noaa.gov/thredds/dodsC/regional/port_lions_815_mhhw_2016.nc.html
protocol OPeNDAP:OPeNDAP
link function download
Description OPeNDAP Dataset Access Form
Digital Transfer Options
Linkage for online resource
name Download NetCDF File
URL: https://www.ngdc.noaa.gov/thredds/fileServer/regional/port_lions_815_mhhw_2016.nc
protocol HTTPS
link function download
Description Download NetCDF File
Digital Transfer Options
Linkage for online resource
name Web Coverage Service GetCapabilities
URL: https://www.ngdc.noaa.gov/thredds/wcs/regional/port_lions_815_mhhw_2016.nc?service=WCS&version=1.0.0&request=GetCapabilities
protocol OGC:WCS
link function information
Description Web Coverage Service GetCapabilities
Digital Transfer Options
Linkage for online resource
name Web Map Service GetCapabilities
URL: https://www.ngdc.noaa.gov/thredds/wms/regional/port_lions_815_mhhw_2016.nc?service=WMS&version=1.3.0&request=GetCapabilities
protocol OGC:WMS
link function information
Description Web Map Service GetCapabilities
Digital Transfer Options
Linkage for online resource
name Download a subset of the NetCDF
URL: https://www.ngdc.noaa.gov/thredds/ncss/regional/port_lions_815_mhhw_2016.nc/dataset.html
protocol HTTPS
link function download
Description Download a subset of the NetCDF
Digital Transfer Options
Linkage for online resource
name NetCDF Markup Language file
URL: https://www.ngdc.noaa.gov/thredds/ncml/regional/port_lions_815_mhhw_2016.nc?catalog=https%3A%2F%2Fwww.ngdc.noaa.gov%2Fthredds%2Fcatalog%2Fregional%2Fcatalog.html&dataset=regionalDatasetScan%2Fport_lions_815_mhhw_2016.nc
protocol HTTPS
link function information
Description NetCDF Markup Language file

Metadata data stamp:  2017-11-30
Resource Maintenance Information
date of next update:  2018-08-29
maintenance or update frequency:  annually
Metadata contact - pointOfContact
organisation Name  DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
position Name DEM Information
Contact information
Address
electronic Mail Address dem.info@noaa.gov
Metadata scope code  dataset
Metadata language  eng; USA
Metadata character set encoding:   utf8
Metadata standard for this record:  ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
standard version:  ISO 19115-2:2009(E)
Metadata record identifier:  gov.noaa.ngdc.mgg.dem:11508

Metadata record format is ISO19139-2 XML (MI_Metadata)