gov.noaa.ngdc.mgg.dem:4270
eng; USA
utf8
dataset
NOAA National Centers for Environmental Information
DEM Information
dem.info@noaa.gov
pointOfContact
2022-03-25
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
3
row
1013
0.000148
column
1620
0.000148
vertical
1
area
true
World Geodetic System 1984
WGS 84
2007-08-27
revision
https://epsg.org/crs_4326/WGS-84.html
WGS 84
GML of World Geodetic System 1984 coordinate reference system.
information
resourceProvider
European Petroleum Survey Group
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
publisher
urn:ogc:def:crs:EPSG::4326
Mean Higher High Water height
MHHW height
2012-08-05
revision
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
resourceProvider
European Petroleum Survey Group
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
publisher
MHHW
Unalaska, Alaska 8/15 Arc-second MHHW Coastal Digital Elevation Model
2012-10-16
publication
First
NOAA National Centers for Environmental Information
publisher
DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
Boulder
Colorado
publisher
DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
originator
National Tsunami Hazard Mitigation Program (NTHMP)
originator
mapDigital
NTHMP DEMs
Unalaska, Alaska 8/15 arc-second
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).
Developed for the University of Alaska at Fairbanks (UAF), Geophysical Institute for tsunami and coastal inundation modeling efforts for the State of Alaska.
completed
NOAA National Centers for Environmental Information
DEM Information
dem.info@noaa.gov
pointOfContact
asNeeded
https://maps.ngdc.noaa.gov/thumbnails/DEM/4270.png
Thumbnail of DEM
PNG
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
theme
Global Change Master Directory (GCMD) Science Keywords
Models/Analyses > DEM > Digital Elevation Model
platform
Global Change Master Directory (GCMD) Platform Keywords
ICSU-WDS > International Council for Science - World Data System
NOAA OneStop Project
project
Global Change Master Directory (GCMD) Project Keywords
2020-01-09
publication
9.1
NASA Goddard Space Flight Center, Earth Science Data and Information System
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
custodian
< 1 meter
dataResolution
Global Change Master Directory (GCMD) Vertical Data Resolution Keywords
Coastal Relief
Gridded elevations
Integrated bathymetry and topography
theme
Uncontrolled
Continent > North America > United States of America > Alaska
Ocean > Pacific Ocean > North Pacific Ocean
Vertical Location > Land Surface
Vertical Location > Sea Floor
place
Global Change Master Directory (GCMD) Location Keywords
Unalaska
Iliuliuk Bay
Dutch Harbor
Aleutian Islands
place
Uncontrolled
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
dataCentre
Global Change Master Directory (GCMD) Data Center Keywords
2020-01-09
publication
9.1
NASA Goddard Space Flight Center, Earth Science Data and Information System
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
custodian
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.
Produced by the NOAA National Centers for Environmental Information. Not subject to copyright protection within the United States.
otherRestrictions
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.
Data Stewardship Maturity Report for Unalaska, Alaska 8/15 arc-second MHHW Coastal Digital Elevation Model
2022
publication
NOAA Institutional Repository
publisher
https://doi.org/10.25923/80s8-7q41
HTTPS
Web Browser
DSMR Publication at the NOAA Institutional Repository
Report documenting the Scientific Data Stewardship Maturity for this dataset.
information
crossReference
sciencePaper
NTHMP DEM Project
2009-12-01
publication
DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
Boulder
Colorado
publisher
DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
originator
https://www.ncei.noaa.gov/maps/bathymetry/
HTTPS
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
mapDigital
NTHMP DEMs
Named by primary coastal city, state in DEM.
largerWorkCitation
Digital Elevation Model of Unalaska, Alaska: Procedures, Data Sources, and Analysis
2012-10-16
publication
DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
Boulder
CO
publisher
Kelly S. Caringan
originator
Lisa A. Taylor
originator
Barry W. Eakins
originator
Matthew R. Love
originator
Citation URL
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
30 pages
crossReference
userGuide
grid
eng; USA
elevation
Native Dataset Environment: Microsoft Windows 2000 Version 5.2 (Build 3790) Service Pack 2; ESRI ArcCatalog 9.2.4.1420
-166.66
-166.42
53.80
53.95
1934-01-01
2012-08-01
Digital Elevation Model Global Mosaic ArcGIS Image Service
2016-06-14
creation
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, Department of Commerce
https://www.ncei.noaa.gov/products/coastal-elevation-models
HTTPS
Coastal Elevation Models at NCEI
information
publisher
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, Department of Commerce
https://noaa.maps.arcgis.com/home/item.html?id=c876e3c96a8642ab8557646a3b4fa0ff
HTTPS
NOAA GeoPlatform Entry for DEM Global Mosaic (Elevation Values)
NOAA GeoPlatform listing for DEM Global Mosaic (Elevation Values)
information
publisher
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, Department of Commerce
https://noaa.maps.arcgis.com/home/item.html?id=e11ebaeb19544bb18c2afe440f063062
HTTPS
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
publisher
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, Department of Commerce
https://noaa.maps.arcgis.com/home/item.html?id=e9ba2e7afb7d46cd878b34aa3bfce042
ESRI:ArcGIS
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
publisher
The DEM Global Mosaic is an image service providing a global, seamless bathymetry/topography mosaic that includes NCEI's ETOPO 2022, NCEI's Continuously Updated DEM (CUDEM), and other NCEI-stewarded DEMs, along with regional grids such as IBCAO, IBCSO and the Hawaiian Island Multibeam Synthesis (University of Hawaii). This service provides elevation/depth values in meters; for a visualization of the data, please see the related DEM Global Mosaic (Color Shaded Relief) service. There are 5 related image services providing access to Digital Elevation Models: DEM Mosaic (Individual DEMs), DEM Global Mosaic (Elevation Values), DEM Global Mosaic (Color Shaded Relief), CUDEM Mosaic (Elevation Values), and CUDEM Mosaic (Color Shaded Relief). 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). No conversion/harmonization of vertical datums was performed. Because the mosaic contains 'overviews' for performance, individual DEMs cannot be separated from the others. Individual DEMs, or smaller subsets, are available in the companion DEM Mosaic (Individual DEMs) image service. 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 feature service for polygon footprints and more information about the individual DEMs used to create this composite view.
NCEI GIS Team
NOAA National Centers for Environmental Information
ncei.gis@noaa.gov
pointOfContact
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
theme
Global Change Master Directory (GCMD) Service Keywords
2020-01-09
publication
9.1
NASA Goddard Space Flight Center, Earth Science Data and Information System
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
custodian
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.
ArcGIS Image Service
10.8.1
1
-180
180
-90
90
tight
ArcGIS Server REST endpoint for image service (Elevation Values)
https://gis.ngdc.noaa.gov/arcgis/rest/services/DEM_mosaics/DEM_global_mosaic/ImageServer
ESRI:ArcGIS
ESRI Image Service REST specification
DEM Global Mosaic (Elevation Values) ArcGIS Image Service
REST endpoint for DEM Global Mosaic (Elevation Values) ArcGIS Image Service
search
ArcGIS for Server REST endpoint for image service (Color Shaded Relief)
https://gis.ngdc.noaa.gov/arcgis/rest/services/DEM_mosaics/DEM_global_mosaic_hillshade/ImageServer
ESRI:ArcGIS
ESRI Image Rest Specification
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
WMS Get Capabilities
https://gis.ngdc.noaa.gov/arcgis/services/DEM_mosaics/DEM_global_mosaic_hillshade/ImageServer/WMSServer?request=GetCapabilities&service=WMS
OGC:WMS
http://opengis.net/spec/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
NCEI Digital Elevation Model Extents ArcGIS Feature Layer
2022-10-24
creation
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, Department of Commerce
https://www.ncei.noaa.gov/products/coastal-elevation-models
HTTPS
Coastal Elevation Models at NCEI
information
publisher
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, Department of Commerce
https://noaa.maps.arcgis.com/home/item.html?id=0afa88a1701749dbbf76fcadca4f77f3
HTTPS
NOAA GeoPlatform Entry for NCEI Digital Elevation Model (DEM) Extents
NOAA GeoPlatform listing for NCEI Digital Elevation Model (DEM) Extents
information
publisher
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, Department of Commerce
https://noaa.maps.arcgis.com/home/item.html?id=c876e3c96a8642ab8557646a3b4fa0ff
HTTPS
NOAA GeoPlatform Entry for DEM Global Mosaic (Elevation Values)
NOAA GeoPlatform listing for DEM Global Mosaic (Elevation Values)
information
publisher
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, Department of Commerce
https://noaa.maps.arcgis.com/home/item.html?id=e11ebaeb19544bb18c2afe440f063062
HTTPS
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
publisher
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, Department of Commerce
https://noaa.maps.arcgis.com/home/item.html?id=e9ba2e7afb7d46cd878b34aa3bfce042
ESRI:ArcGIS
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
publisher
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).
NCEI GIS Team
NOAA National Centers for Environmental Information
ncei.gis@noaa.gov
pointOfContact
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
theme
Global Change Master Directory (GCMD) Service Keywords
2020-01-09
publication
9.1
NASA Goddard Space Flight Center, Earth Science Data and Information System
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
custodian
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.
ArcGIS Feature Service
11.0
1
-180
180
-90
90
tight
ArcGIS Server REST endpoint for feature service
https://services2.arcgis.com/C8EMgrsFcRFL6LrL/arcgis/rest/services/ncei_dem_extents/FeatureServer
HTTPS
ESRI Feature Service REST Specification
NCEI Digital Elevation Model (DEM) Extents ArcGIS Feature Service
REST endpoint for NCEI Digital Elevation Model (DEM) Extents ArcGIS Feature Service
search
netCDF
4 Classic
NOAA National Centers for Environmental Information
DEM Information
dem.info@noaa.gov
pointOfContact
https://www.ngdc.noaa.gov/mgg/coastal
HTTPS
DEM text search
Text search for locating completed and planned DEMs.
search
https://www.ncei.noaa.gov/maps/bathymetry/
HTTPS
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
https://www.ngdc.noaa.gov/thredds/dodsC/regional/unalaska_815_mhhw_2012.nc.html
OPeNDAP:OPeNDAP
OPeNDAP Dataset Access Form
OPeNDAP Dataset Access Form
download
https://www.ngdc.noaa.gov/thredds/fileServer/regional/unalaska_815_mhhw_2012.nc
HTTPS
Download NetCDF File
Download NetCDF File
download
https://www.ngdc.noaa.gov/thredds/wcs/regional/unalaska_815_mhhw_2012.nc?service=WCS&version=1.0.0&request=GetCapabilities
OGC:WCS
Web Coverage Service GetCapabilities
Web Coverage Service GetCapabilities
information
https://www.ngdc.noaa.gov/thredds/wms/regional/unalaska_815_mhhw_2012.nc?service=WMS&version=1.3.0&request=GetCapabilities
OGC:WMS
Web Map Service GetCapabilities
Web Map Service GetCapabilities
information
https://www.ngdc.noaa.gov/thredds/ncss/regional/unalaska_815_mhhw_2012.nc/dataset.html
HTTPS
Download a subset of the NetCDF
Download a subset of the NetCDF
download
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
HTTPS
NetCDF Markup Language file
NetCDF Markup Language file
information
repository
NOAA National Centers for Environmental Information
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.
2015-04-22T00:00:00
dataset
Horizontal Positional Accuracy Report
The horizontal 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. Positional accuracy of input topographic datasets limits accuracy of corresponding cell values in DEM. USGS SRTM DEM: 15 to 30 meters. DEM cell-value relative-contribution factors: NGDC: 1,000, UAF GPS: 100, Unalaska contours: 10, SRTM: .1. Bathymetry: Less than
two to several hundreds of meters. Positional accuracy of input bathymetric datasets limits accuracy of corresponding cell values in DEM. USACE (primarily in dredged shipping channels): less than 2 meters. Early 20th-century NOS hydrographic soundings are limited by sparseness of deep-water soundings, and potentially large position accuracy of pre-satellite (i.e., GPS) navigation: tens to several hundreds of meters. DEM cell-value relative-contribution factors: USACE hydrographic
soundings: 100, NOS soundings: 10, NGDC digitized elevations: .1, NGDC mutibeam: .1.
Vertical Positional Accuracy Report
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 15 meters. Vertical accuracy of input topographic datasets limits accuracy of corresponding cells in DEM. SRTM DEM: 16 meters. DEM cell-value relative-contribution factors: NGDC: 1,000, UAF GPS: 100, Unalaska contours: 10, SRTM: .1. Bathymetry: 0.3 meters to 5% of water depth.
Vertical accuracy of input bathymetric datasets limits accuracy of corresponding cells in DEM. USACE (primarily in dredged shipping channels): less than 1 meter. Early 20th-century NOS hydrographic soundings are limited by sparseness of deep-water soundings, and potentially large position accuracy of pre-satellite (i.e., GPS) navigation: several tens of meters. DEM cell-value relative-contribution factors: USACE hydrographic soundings: 100, NOS soundings: 10, NGDC digitized
elevations: .1, NGDC mutibeam: .1. Gridding interpolation to determine cell values between sparse NOS hydrographic soundings in deep water degrades the vertical accuracy of deep-water elevations.
NGDC made every effort to obtain all available digital topographic and bathymetric datasets in the region for use in building the DEM.
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.
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.
2012-06-26T00:00:00
Barry W. Eakins
NOAA National Centers for Environmental Information
Research Scientist
303-497-6505
325 Broadway, E/GC3
Boulder
Colorado
80305-3328
USA
Barry.Eakins@noaa.gov
9am-5pm, M-F, Mountain Time
Contact Marine Geology and Geophysics Division
pointOfContact
Datasets were visually inspected with ArcGIS for identification and editing of data anomalies. Datasets were then compared with overlapping datasets to ensure data consistency.
2012-07-03T00:00:00
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.
2012-07-26T00:00:00
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.
2012-08-02T00:00:00
Retrieved processed NOS survey data from archive
NOS Hydrographic Surveys
2008-01-01
publication
DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
originator
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
Source Contribution: gridded topographic data downloaded from web site. ; Source Type: on web
Shuttle Radar Topography Mission (SRTM)
2012-07-27
publication
NASA > National Aeronautics and Space Administration
originator
https://lta.cr.usgs.gov/SRTM1Arc
Shuttle Radar Topography Mission
global topography
download
2000-01-01
bathymetric sounding data
Electronic Navigational Charts
2010-08-16
publication
DOC/NOAA/NOS/OCS > Office of Coast Survey, National Ocean Service, NOAA, U.S. Department of Commerce
originator
http://www.nauticalcharts.noaa.gov/mcd/enc/index.htm
OCS Electronic Navigational Charts
Digital database of NOAA nautical chart information.
download
2012-07-10
hydrographic condition survey of harbor
U.S. Army Corps of Engineers (USACE)
2012-07-27
publication
U.S. Army Corps of Engineers (USACE)
originator
2010-08-11
Multibeam swath sonar surveys
NGDC Multibeam Surveys
2012-07-19
publication
DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
originator
https://www.ngdc.noaa.gov/mgg/bathymetry/multibeam.html
NGDC Multibeam Survey Database
Digital database of NGDC multibeam surveys.
download
2002-01-01
2010-01-01
GPS survey data obtained from UAF
UAF Unalaska GPS
2011-09-22
publication
University of Alaska at Fairbanks
originator
2010-09-22
Topographic contour vector data
Unalaska Topographic Contours
2012-07-25
publication
City of Unalaska, Alaska
originator
2012-07-25
tidal information table from which vertical datum adjustment information are interpreted
Bench Mark Data Sheet with Tidal Datum References
2011-10-24
publication
DOC/NOAA/NOS National Ocean Service, NOAA, U.S. Department of Commerce
originator
https://tidesandcurrents.noaa.gov/stations.html
Tides and Currents Station Selection
Bench Mark Data Sheet for station 9462620
information
documentDigital
1997-01-01
2001-01-01
series
Data Stewardship
Data Stewardship Maturity Assessment
MM-Stew
The Data Stewardship Maturity Matrix (DSMM) is a unified framework that defines criteria for each of nine components based on measurable practices, which can be used to apply a progressive, 6-level rating to an individual dataset, representing stewardship maturity stages rated as Not Assessed or Not Available (Level 0), adHoc (Level 1), minimum (Level 2), intermediate (Level 3), advanced (Level 4), and optimal (Level 5).
Data Stewardship Maturity Assessment was evaluated by the metadata content editor for the NOAA OneStop project using the Scientific Data Stewardship Maturity Assessment Model Template v4.0.
The Scientific Data Stewardship Maturity Assessment Model Template
2015-06-23
publication
NCDC-CICS-SMM_0001_Rev.1 v4.0 06/23/2015
doi:10.10.6084/m9.figshare.1211954
Peng, Ge
CICS-NC/NCEI
author
https://doi.org/10.6084/m9.figshare.1211954
HTTPS
Web Browser
The Scientific Data Stewardship Maturity Assessment Model Template
Landing page for quality evaluation procedure.
information
documentDigital
2016-06-22T00:00:00
optimal
advanced
intermediate
advanced
intermediate
intermediate
minimal
minimal
intermediate
Unalaska_AK_8_15s_MHHW_DEM
2016-06-22
publication
v01r00
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
publisher
Data Stewardship Maturity Assessment was evaluated by the metadata content editor for the NOAA OneStop project using the Scientific Data Stewardship Maturity Assessment Model Template v4.0.
annually
2013-08-14
This metadata was automatically generated from the Content Standard for Digital Geospatial Metadata: Extensions for Remote Sensing Metadata standard (version FGDC-STD-012-2002) using the 2012-08-07. f version of the FGDC RSE to ISO 19115-2 transform for DEMs.
Last Translation from FGDC 2012-08-07T15:56:17.913-06:00
This record was automatically modified on 2015-09-03 to include references to NCEI where applicable.
Kelly Carignan
NOAA National Centers for Environmental Information
kelly.carignan@noaa.gov
pointOfContact
NOAA National Centers for Environmental Information
Metadata Specialist
editor
Sound Navigation and Ranging
NTHMP DEM Gridding Project
Digital Elevation Model