gov.noaa.ngdc.mgg.dem:703
dataset
NOAA National Centers for Environmental Information
ncei.info@noaa.gov
https://www.ncei.noaa.gov/contact
NCEI Contact Information
Information for contacts at NCEI.
information
pointOfContact
2020-05-21
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
3
row
9001
0.006666667
column
2701
0.0066666667
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 Sea Level depth
MSL depth
2012-08-10
revision
https://epsg.org/crs_5715/MSL-depth.html
MSL depth
GML for Vertical CRS in EPGS 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
urn:ogc:def:crs:EPSG::5715
Southern Alaska Coastal Relief Model
2009-06-30
publication
First
International DOI Foundation (IDF)
doi:10.7289/V58G8HMQ
NOAA National Centers for Environmental Information
NCEI Metadata ID: gov.noaa.ngdc.mgg.dem:703
NOAA National Centers for Environmental Information
publisher
NOAA National Geophysical Data Center
author
NOAA's National Geophysical Data Center (NGDC) is building coastal-relief models (CRM) for select U.S. coastal regions. Bathymetric, topographic, and shoreline data used in DEM compilation are obtained from various sources, including NGDC, the U.S. National Ocean Service (NOS), the National , the United States Geological Survey (USGS), the National Aeronautics and Space Administration, the Office of Coast Survey (OCS) and other federal, state, and local government agencies, academic institutions, and private companies. DEMs are referenced to the vertical tidal datum of Mean Sea Level (MSL) and horizontal datum of World Geodetic System 1984 (WGS 84). Grid spacings for the Southern Alaska CRM is 24 arc-seconds (~720 meters).
The CRM provides a framework to enable scientists to model wave propagation and ocean circulation. In addition, it may be useful for benthic habitat research, weather forecasting, and environmental stewardship.
completed
historicalArchive
NOAA National Centers for Environmental Information
ncei.info@noaa.gov
https://www.ncei.noaa.gov/contact
NCEI Contact Information
Information for contacts at NCEI.
information
pointOfContact
NOAA National Centers for Environmental Information
DEM Information
dem.info@noaa.gov
pointOfContact
asNeeded
https://gis.ngdc.noaa.gov/arcgis/rest/directories/arcgisoutput/DEM_mosaics/DEM_global_mosaic_hillshade_ImageServer/_ags_c0493660_fa20_45af_835e_2525819b9eae.png
Thumbnail of DEM
JPG
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
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
Models/Analyses > DEM > Digital Elevation Model
platform
Global Change Master Directory (GCMD) Platform 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
ICSU-WDS > International Council for Science - World Data System
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 - < 30 meters
dataResolution
Global Change Master Directory (GCMD) Horizontal Data Resolution 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
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
Coastal Relief
Gridded elevations
Integrated bathymetry and topography
theme
Uncontrolled
Continent > North America > United States of America > Alaska
Ocean > Pacific Ocean > North Pacific Ocean > Gulf of Alaska
Vertical Location > Land Surface
Vertical Location > Sea Floor
place
Global Change Master Directory (GCMD) Location 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
Alaska
Southern Alaska
Gulf of Alaska
Bering Sea
Prince William Sound
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
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.
otherRestrictions
Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
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
Cite as: NOAA National Geophysical Data Center. 2009: Southern Alaska Coastal Relief Model. NOAA National Centers for Environmental Information. https://doi.org/10.7289/V58G8HMQ. Accessed [date].
Coastal Relief Model of Southern Alaska: Procedures, Data Sources, and Analysis
2011-06-24
publication
https://www.ngdc.noaa.gov/mgg/dat/dems/regional_tr/crm_southak.pdf
Coastal Relief Model of Southern Alaska: Procedures, Data Sources and Analysis
Report describing the development of the Southern Alaska CRM
download
E. Lim
originator
B.W. Eakins
originator
R. Wigley
originator
28 pages
crossReference
userGuide
eng; USA
oceans
geoscientificInformation
elevation
170
230
48.50
66.50
1888-01-01
2009-01-01
Digital Elevation Models: Color Shaded Relief ArcGIS Image Service
2011-10-19
creation
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, Department of Commerce
https://ngdc.noaa.gov/mgg/coastal/coastal.html
HTTPS
Integrated Models of Coastal Relief at NGDC
Please see website for more information about Coastal DEMs.
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=feb3c625dc094112bb5281c17679c769
HTTPS
NOAA GeoPlatform Entry for Digital Elevation Models Global Mosaic (Color Shaded Relief)
NOAA GeoPlatform listing for Digital Elevation Models Global Mosaic (Color Shaded Relief)
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=d41f39c8a6684c54b62c8f1ab731d5ad
ESRI:ArcGIS
NOAA GeoPlatform Entry for DEM Footprints ArcGIS Map Service
A map service showing the location and coverage of land and seafloor digital elevation models (DEMs) available.
search
publisher
This is an ArcGIS image service showing color shaded relief visualizations of high-resolution digital elevation models (DEMs) of U.S. coastal regions. NOAA's National Geophysical Data Center (NGDC) 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. DEMs included in this visualization: High-resolution DEMs of select U.S. coastal communities and surrounding areas. Most are at a resolution of 1/3 to 1 arc-second (approx 10-30 m); U.S. Coastal Relief Model: A 3 arc-second (approx 90 m) comprehensive view of the conterminous U.S. coastal zone, Puerto Rico, and Hawaii; Southern Alaska Coastal Relief Model: A 24 arc-second (approx. 500 m) model of Southern Alaska, spanning the Bering Sea, Aleutian Islands, and Gulf of Alaska. This map service can be used as a basemap. It has a transparent background, so it can also be shown as a layer on top of a different basemap. Please see NGDC's corresponding DEM Footprints map 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
10.7
1
-180
180
-90
90
tight
ArcGIS for Server REST endpoint for image service
https://gis.ngdc.noaa.gov/arcgis/rest/services/DEM_mosaics/DEM_global_mosaic_hillshade/ImageServer
ESRI:ArcGIS
ArcGIS Map Service
Digital Elevation Models Global Mosaic (Color Shaded Relief) ArcGIS Image Service
REST endpoint for Digital Elevation Models Global Mosaic (Color Shaded Relief) ArcGIS image service
search
WMS Get Capabilities
https://gis.ngdc.noaa.gov/arcgis/rest/services/DEM_mosaics/DEM_global_mosaic_hillshade/ImageServer/WMSServer?request=GetCapabilities&service=WMS
OGC:WMS
Open Geospatial Consortium Web Map Service (WMS)
Digital Elevation Models Global Mosaic (Color Shaded Relief) Web Map Service (WMS)
Capabilities document for Open Geospatial Consortium Web Map Service for Digital Elevation Models 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
NOAA National Centers for Environmental Information
ncei.info@noaa.gov
https://www.ncei.noaa.gov/contact
NCEI Contact Information
Information for contacts at NCEI.
information
distributor
In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media.
Contact NCEI for other distribution options and instructions.
netCDF
4 Classic
https://www.ncei.noaa.gov/metadata/geoportal/rest/metadata/item/gov.noaa.ngdc.mgg.dem:703/html
HTTPS
Metadata Landing Page
information
https://www.ngdc.noaa.gov/thredds/dodsC/crm/crm_southak.nc.html
OPeNDAP:OPeNDAP
OPeNDAP Dataset Access Form
OPeNDAP Dataset Access Form
download
https://www.ngdc.noaa.gov/thredds/fileServer/crm/crm_southak.nc
HTTPS
Download NetCDF File
Download NetCDF File
download
https://www.ngdc.noaa.gov/thredds/wcs/crm/crm_southak.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/crm/crm_southak.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/crm/crm_southak.nc/dataset.html
HTTPS
Download a subset of the NetCDF
Download a subset of the NetCDF
download
https://www.ngdc.noaa.gov/thredds/ncml/crm/crm_southak.nc?catalog=https%3A%2F%2Fwww.ngdc.noaa.gov%2Fthredds%2Fcatalog%2Fcrm%2Fcatalog.html&dataset=crmDatasetScan%2Fcrm_southak.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 DEM cell size and the accuracy of the input datasets used to determine corresponding cell values. Topography: NED 2 arc-second DEM: 60 meters, SRTM/CGIAR 3 arc-second DEM: 90 meters, NGDC GLOBE 30 arc-second DEM: 900 meters. DEM cell-value relative-contribution factors: NED 1/3 arc-second DEM: 10, SRTM/CGIAR DEM: 100, NGDC GLOBE DEM: 10. Bathymetry: a few tens of meters to several hundreds of meters. Positional accuracy of input bathymetric datasets limits accuracy of corresponding cell values in DEM. Recent NOS hydrographic data: about 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: tens to several hundreds of meters. NGDC multibeam sonar: about 300 meters Where present, recent NOS hydrographic survey data and NGDC multibeam supplant early 20th-centruy NOS hydrographic sounding. NOAA ENC's: ~500 to 1200 meters. NGDC Trackline: ~300 meters. NGDC ETOPO1: ~1800 meters. DEM cell-value relative-contribution factors: NOS hydrographic soundings: 10, NGDC Multibeam: 100, ENC soundings: 10, NGDC Trackline: 0.1, ETOPO1: 0.1. Positional accuracy of input bathymetric-topographic datasets limits accuracy of corresponding cell values in DEM. NGDC bathymetric-topographic DEMs: 30 to 240 meters. DEM cell-value relative-contribution factors: 100.
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: NED 2 arc-second DEM: +/- 2.44 meters, SRTM/CGIAR 3 arc-second DEM: +/-10 meters, NGDC GLOBE 30 arc-second DEM: +/- 10 to 250 meters. DEM cell-value relative-contribution factors: NED 2 arc-second DEM: 10, SRTM/CGIAR 3 arc-second DEM: 10, NGDC GLOBE 30 arc-second DEM: 1. Bathymetry: 30 meters to 5% of water depth. ENC soundings are sampled from the NOS hydrographic survey charts. Vertical accuracy of input bathymetric datasets limits accuracy of corresponding cells in DEM. GPS-navigated NGDC multibeam sonar sonar data: about 0.1 meter. Early 20th-century NOS hydrographic soundings and some NGDC marine trackline geophysics data are limited by sparseness of deep-water soundings, and potentially large position accuracy of pre-satellite (i.e., GPS) navigation: several tens of meters. Where present, recent NOS hydrographic data supersede early 20th-centruy NOS hydrographic sounding data values in the DEM. The vertical accuracy of ETOPO1 is dependent upon the data sets used to determine corresponding DEM cell values. DEM cell relative-contribution factors: NOS hydrographic soundings: 10, NGDC multibeam: 100, ENC soundings: 10. Gridding interpolation to determine cell values between sparse NOS hydrographic soundings degrades the vertical accuracy of elevations. Bathymetry-topography: NGDC bathymetric-topographic DEMs: dependent upon input datasets.
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 and Applied Imagery QT Modeler 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 datum of WGS 84 geographic using FME or ArcGIS. They were also converted to common file format, ESRI point shapefiles or digital rasters, for visualization and inspection.
2008-06-15T00:00:00
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 and QT Modeler for identification and editing of data anomalies. Datasets were then compared with overlapping datasets to ensure data consistency.
2008-07-02T00:00:00
xyz files of the bathymetric data were surfaced using GMT's 'surface' tool onto a 20 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.
2009-02-15T00:00:00
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. Gridding was performed in quadrants, each with a 5% data buffer. The grids were imported in ArcGIS and seamlessly merged to create the final DEM.
2009-05-20T00:00:00
The DEM was quantitatively evaluated by comparing the grid against source data files.
2009-05-30T00:00:00
Source Contribution: hydrographic surveys ; Source Type: online
NOS Hydrographic Surveys
2009-01-01
publication
NOAA National Geophysical Data Center
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
1888-01-01
2005-01-01
Source Contribution: Multibeam bathymetry data ; Source Type: online
NGDC Multibeam Bathymetry Database
2008-01-01
publication
NOAA National Geophysical Data Center
originator
https://www.ngdc.noaa.gov/mgg/bathymetry/multibeam.html
NGDC Multibeam Bathymetry Database
Multibeam swath sonar survey data
download
1986-01-01
2005-01-01
Source Contribution: ENC soundings extracted from NOS charts ; Source Type: web
Electronic Navigational Chart (ENC) soundings
2009-01-01
publication
OCS > NOAA Office of Coast Survey
originator
http://www.nauticalcharts.noaa.gov/mcd/enc/index.htm
Electronic Navigational Chart (ENC) soundings
ENC soundings extracted from NOS charts
download
2008-01-01
Source Contribution: gridded topography ; Source Type: online
Shuttle Radar Topography Mission (SRTM) processed by CGIAR
2008-01-01
publication
NASA > National Aeronautics and Space Administration
originator
http://srtm.csi.cgiar.org/
Shuttle Radar Topography Mission/CGIAR
global topography
download
2000-01-01
Source Contribution: bathymetry and topography ; Source Type: online
NGDC ETOPO1
2008-01-01
publication
NOAA National Geophysical Data Center
originator
https://www.ngdc.noaa.gov/mgg/global/global.html
NGDC ETOPO1
Integrated bathymetric-topographic global DEM
download
2007-01-01
2008-01-01
Source Contribution: Topographic DEM ; Source Type: online
USGS NED topography
2008-01-01
publication
USGS > United States Geological Survey
originator
http://seamless.usgs.gov/
USGS National Elevation Dataset
Digital database of U.S. topography, in raster form (DEM)
download
1999-01-01
2003-01-01
Source Contribution: NGDC Bathymetric-topographic DEMs ; Source Type: online
NGDC Bathymetric-topographic DEMs
2009-01-01
publication
NOAA National Geophysical Data Center
originator
https://www.ngdc.noaa.gov/mgg/inundation/tsunami/
NGDC Bathymetric-topographic DEMs
Integrated bathymetric-topographic DEMs
download
2006-01-01
2009-01-01
Source Contribution: composite shoreline ; Source Type: online
U.S. Fish and Wildlife Service coastline
2006-01-01
publication
U.S. FWS > United States Fish and Wildlife Service
originator
http://www.fws.gov/
Seamless digital coastline of the state of Alaska compiled from a variety of sources.
The U.S. Fish and Wildlife Service has compiled a seamless digital coastline of the State of Alaska from a variety of sources, including: the National Hydrography Dataset, NOAA nautical charts, U.S. Fish and Wildlife Service, National Geographic Topo Software, U.S. Army Corps of Engineers, and Alaska Department of Natural Resources.
download
1995-01-01
2006-01-01
Source Contribution: shoreline ; Source Type: online
NGA Global Shoreline
2000-01-01
publication
NGA > National Geospatial-Intelligence Agency
originator
http://msi.nga.mil/NGAPortal/MSI.portal
National Geospatial-Intelligence Agency
The NGA Global Shoreline Data is an unclassified vector dataset generated by Earth Satellite Corporation
download
1998-01-01
2002-01-01
Source Contribution: shoreline ; Source Type: online
Global Self-consistent, Hierarchical, High-resolution Shoreline (GSHHS)
2005-01-01
publication
NGDC > National Geophysical Data Center
originator
https://www.ngdc.noaa.gov/mgg/shorelines/gshhs.html
National Geophysical Data Center
GSHHS is a high-resolution shoreline data set created from two well-known, public domain data sets.
download
2003-01-01
2010-01-01
asNeeded
Modified for compliance to NCEI Template v1.2.