gov.noaa.ngdc.mgg.dem:405
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
2020-05-21-06:00
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
3
row
10801
0.00009259259
column
7021
0.00009259259
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 High Water height
MHW height
2012-08-05
revision
https://epsg.org/crs_5868/MHW-height.html
MHW height
GML for Mean High Water height available at 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
urn:ogc:def:datum:EPSG::5868
Kawaihae, Hawaii Coastal Digital Elevation Model
2007-08-08
publication
First
NOAA National Centers for Environmental Information
NCEI Metadata ID: gov.noaa.ngdc.mgg.dem:405
NOAA National Centers for Environmental Information
publisher
NOAA National Geophysical Data Center
author
mapDigital
NOAA Tsunami Inundation DEMs
Kawaihae, Hawaii
NOAA's National Geophysical Data Center (NGDC) is building high-resolution digital elevation models (DEMs) for select U.S. coastal regions. These integrated bathymetric-topographic DEMs are used to support tsunami forecasting and modeling efforts at the NOAA Center for Tsunami Research, Pacific Marine Environmental Laboratory (PMEL). The DEMs are part of the tsunami forecast system SIFT (Short-term Inundation Forecasting for Tsunamis) currently being developed by PMEL for the NOAA Tsunami Warning Centers, and are used in the MOST (Method of Splitting Tsunami) model developed by PMEL to simulate tsunami generation, propagation, and inundation. Bathymetric, topographic, and shoreline data used in DEM compilation are obtained from various sources, including NGDC, the U.S. National Ocean Service (NOS), the U.S. Geological Survey (USGS), the U.S. Army Corps of Engineers (USACE), the Federal Emergency Management Agency (FEMA), and other federal, state, and local government agencies, academic institutions, and private companies. DEMs are referenced to the vertical tidal datum of Mean High Water (MHW) and horizontal datum of World Geodetic System 1984 (WGS84). Grid spacings for the DEMs range from 1/3 arc-second (~10 meters) to 3 arc-seconds (~90 meters).
Developed for the Pacific Marine Environmental Laboratory (PMEL), NOAA Center for Tsunami Research program in support of NOAA's tsunami forecasting and warning efforts.
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://maps.ngdc.noaa.gov/thumbnails/DEM/405.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
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
Ocean > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands
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
Kawaihae
Kawaihae Bay
Mahukona Volcano
Hualalai Volcano
Kohala Volcano
Island of Hawaii
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. 2007: Kawaihae, Hawaii Coastal Digital Elevation Model. NOAA National Centers for Environmental Information. Accessed [date].
NOAA Tsunami Inundation Gridding Project
2008-10-31
publication
NOAA National Geophysical Data Center
Boulder
Colorado
publisher
NOAA National Geophysical Data Center
originator
DOC/NOAA/OAR/PMEL/NCTR > NOAA Center for Tsunami Research, Pacific Marine Environmental Laboratory, OAR, 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
https://www.ngdc.noaa.gov/mgg/coastal
HTTPS
DEM text search
Text search for locating completed and planned DEMs.
search
mapDigital
NOAA Tsunami Inundation DEMs
Named by primary coastal city, state in DEM.
largerWorkCitation
Digital Elevation Model of Kawaihae, Hawaii: Procedures, Data Sources, and Analysis
2008-01-01
publication
NOAA National Geophysical Data Center
Boulder
CO
publisher
Lisa A. Taylor
originator
Barry W. Eakins
originator
Kelly S. Carignan
originator
Robin R. Warnken
originator
Tatiana Sazonova
originator
David C. Schoolcraft
originator
NOAA Technical Memorandum
NESDIS NGDC-15
17 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
-156.25
-155.6
19.40
20.40
1932-01-01
2006-01-01
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:405/html
HTTPS
Metadata Landing Page
information
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
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 15 meters along the coast and greater inland. Positional accuracy of input topographic datasets limits accuracy of corresponding cell values in DEM. USGS NED DEM: 10 to 15 meters. DEM cell-value relative-contribution factors: NED: 1000. Bathymetry: 10 to several tens of meters. Positional accuracy of input bathymetric datasets limits accuracy of corresponding cell values in DEM. NOS, NGDC multibeam sonar (primarily in dredged shipping channels): about 1 meter; JALBTCX: about 3 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 tens of meters. Morphologic change in inland rivers and along the coast also degrades the positional accuracy of NOS soundings. Where present, multibeam sonar and LiDAR survey data supplant NOS hydrographic sounding data values in the DEM. DEM cell-value relative-contribution factors: multibeam sonar data: 100, NOS hydrographic soundings: 100, JALBTCX coastal bathymetric LiDAR: 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: 7 meters. Vertical accuracy of input topographic datasets limits accuracy of corresponding cells in DEM. USGS NED DEM: up to 7 meters. DEM cell relative-contribution factors: NED: 10. Bathymetry: 0.1 meters to 5% of water depth. Vertical accuracy of input bathymetric datasets limits accuracy of corresponding cells in DEM. GPS-navigated NOS, NGDC multibeam sonar (primarily in dredged shipping channels)and JALBTCX LiDAR surveys: about 0.1 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 meters. Where present, multibeam sonar and LiDAR data supersede NOS hydrographic sounding data values in DEM. DEM cell relative-contribution factors: multibeam sonar: 100, NOS hydrographic soundings: 100, JALBTCX coastal bathymetric LiDAR: 100. 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 High Water, respectively, using FME. They were also converted to common file format, ESRI point shapefiles, for visualization and inspection.
2007-06-06T00:00:00
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.
2007-06-15T00:00:00
Multibeam surveys were gridded to 1/3 arc-second spacing (~10 meters) using MB-System's 'mbgrid' tool. The resulting Arc ASCII grid was imported into ArcGIS.
2007-06-20T00:00:00
xyz files of the bathymetric data were surfaced using GMT's 'surface' tool onto a 1 arc-second grid that interpolated to fill empty cells. Points extracted every 10 meters along the coastline were also included to ensure that the bathymetric grid reached zero at the coast. The resulting Arc ASCII grid was imported into ArcGIS and clipped to the coastline to remove values over land.
2008-07-08T00:00:00
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.
2008-07-20T00:00:00
The DEM was quantitatively evaluated by comparing with source datasets and with elevation values extracted from NGS geodetic monuments. It was visually evaluated by converting to UTM-zone coordinates (units of meters horizontally and vertically) and then creating a slope grid to identify gridding artifacts in the DEM.
2008-07-29T00:00:00
Source Contribution: hydrographic surveys downloaded from web site. ; Source Type: online
NOS Hydrographic Surveys
2008-01-01
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
1932-01-01
1987-01-01
Source Contribution: topographic DEM downloaded from web site. ; Source Type: online
USGS NED topography
2008-01-01
publication
DOI/USGS > U.S. Geological Survey, Department of the Interior
originator
http://ned.usgs.gov/
USGS National Elevation Dataset
Digital database of U.S. topography, in raster form (DEM)
download
2001-01-01
Source Contribution: multibeam swath sonar surveys downloaded from web site. ; 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
2002-01-01
asNeeded
Modified for compliance to NCEI Template v1.2.
Light Detection and Ranging
Multibeam Swath Bathymetry System
Sound Navigation and Ranging
Tsunami Inundation Gridding Project
Digital Elevation Model