Midway Atoll Coastal Digital Elevation Model
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title: Midway Atoll Coastal Digital Elevation Model
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date: 2009-06-30
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abstract: 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 (WGS 84). Grid spacings for the DEMs range from 1/3 arc-second (~10 meters) to 3 arc-seconds (~90 meters).
purpose: Developed for the Pacific Marine Environmental Laboratory (PMEL), NOAA Center for Tsunami Research program in support of NOAA's tsunami forecasting and warning efforts.
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keyword: Earth Science > Oceans > Bathymetry/Seafloor Topography > Seafloor Topography
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keyword: Earth Science > Oceans > Bathymetry/Seafloor Topography > Water Depth
keyword: Earth Science > Land Surface > Topography > Terrain Elevation
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keyword: Coastal Relief
keyword: Gridded elevations
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keyword: Ocean > Pacific Ocean
keyword: Ocean > Pacific Ocean > North Pacific Ocean
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keyword: DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
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otherConstraints: 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.
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otherConstraints: 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.
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useLimitation: 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.
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useLimitation: Produced by the NOAA National Centers for Environmental Information. Not subject to copyright protection within the United States.
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otherConstraints: Cite as: NOAA National Geophysical Data Center. 2009: Midway Atoll Coastal Digital Elevation Model. NOAA National Centers for Environmental Information. Accessed [date].
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title: Digital Elevation Models of Midway Atoll: Procedures, Data Sources, and Analysis
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language: eng; USA
topicCategory: (MD_TopicCategoryCode) elevation
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title: Digital Elevation Models: Color Shaded Relief ArcGIS Image Service
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abstract: 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.
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useLimitation: 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.
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linkage: https://noaa.maps.arcgis.com/home/item.html?id=e11ebaeb19544bb18c2afe440f063062
protocol: HTTPS
name: NOAA GeoPlatform Entry for DEM Global Mosaic (Color Shaded Relief)
description: Shaded relief visualization of a global seamless bathymetry/topography mosaic of digital elevation models at NOAA/NCEI.
function: (CI_OnLineFunctionCode) information
role: (CI_RoleCode) publisher
citedResponsibleParty: (CI_ResponsibleParty)
organisationName: DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, Department of Commerce
contactInfo: (CI_Contact)
onlineResource: (CI_OnlineResource)
linkage: https://noaa.maps.arcgis.com/home/item.html?id=e9ba2e7afb7d46cd878b34aa3bfce042
protocol: ESRI:ArcGIS
name: Digital Elevation Models Mosaic (Individual DEMs)
description: 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.
function: (CI_OnLineFunctionCode) search
role: (CI_RoleCode) publisher
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).
pointOfContact: (CI_ResponsibleParty)
individualName: NCEI GIS Team
organisationName: NOAA National Centers for Environmental Information
contactInfo: (CI_Contact)
address: (CI_Address)
electronicMailAddress: ncei.gis@noaa.gov
role: (CI_RoleCode) pointOfContact
descriptiveKeywords: (MD_Keywords)
keyword: DATA ANALYSIS AND VISUALIZATION > GEOGRAPHIC INFORMATION SYSTEMS > WEB-BASED GEOGRAPHIC INFORMATION SYSTEMS
keyword: DATA MANAGEMENT/DATA HANDLING > DATA SEARCH AND RETRIEVAL
keyword: DATA ANALYSIS AND VISUALIZATION > VISUALIZATION/IMAGE PROCESSING
type: (MD_KeywordTypeCode) theme
thesaurusName: (CI_Citation)
title: Global Change Master Directory (GCMD) Service Keywords
date: (CI_Date)
date: 2020-01-09
dateType: (CI_DateTypeCode) publication
edition: 9.1
citedResponsibleParty: (CI_ResponsibleParty)
organisationName: NASA Goddard Space Flight Center, Earth Science Data and Information System
contactInfo: (CI_Contact)
onlineResource: (CI_OnlineResource)
linkage: https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords
name: Global Change Master Directory (GCMD) Keywords
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.
function: (CI_OnLineFunctionCode) information
role: (CI_RoleCode) custodian
resourceConstraints: (MD_Constraints)
useLimitation: 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.
serviceType:
LocalName: ArcGIS Feature Service
serviceTypeVersion: 11.0
extent: (EX_Extent)
geographicElement: (EX_GeographicBoundingBox)
extentTypeCode: 1
westBoundLongitude: -180
eastBoundLongitude: 180
southBoundLatitude: -90
northBoundLatitude: 90
couplingType: (SV_CouplingType) tight
containsOperations: (SV_OperationMetadata)
operationName: ArcGIS Server REST endpoint for feature service
DCP: (unknown)
connectPoint: (CI_OnlineResource)
linkage: https://services2.arcgis.com/C8EMgrsFcRFL6LrL/arcgis/rest/services/ncei_dem_extents/FeatureServer
protocol: HTTPS
applicationProfile: ESRI Feature Service REST Specification
name: NCEI Digital Elevation Model (DEM) Extents ArcGIS Feature Service
description: REST endpoint for NCEI Digital Elevation Model (DEM) Extents ArcGIS Feature Service
function: (CI_OnLineFunctionCode) search
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distributionInfo: (MD_Distribution)
distributor: (MD_Distributor)
distributorContact: (CI_ResponsibleParty)
organisationName: NOAA National Centers for Environmental Information
contactInfo: (CI_Contact)
address: (CI_Address)
electronicMailAddress: ncei.info@noaa.gov
onlineResource: (CI_OnlineResource)
linkage: https://www.ncei.noaa.gov/contact
name: NCEI Contact Information
description: Information for contacts at NCEI.
function: (CI_OnLineFunctionCode) information
role: (CI_RoleCode) distributor
distributionOrderProcess: (MD_StandardOrderProcess)
fees: 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.
orderingInstructions: Contact NCEI for other distribution options and instructions.
distributorTransferOptions: (MD_DigitalTransferOptions)
onLine: (CI_OnlineResource)
linkage: https://www.ncei.noaa.gov/metadata/geoportal/rest/metadata/item/gov.noaa.ngdc.mgg.dem:642/html
protocol: HTTPS
name: Metadata Landing Page
function: (CI_OnLineFunctionCode) information
distributorTransferOptions: (MD_DigitalTransferOptions)
onLine: (CI_OnlineResource)
linkage: https://www.ngdc.noaa.gov/mgg/coastal
protocol: HTTPS
name: DEM text search
description: Text search for locating completed and planned DEMs.
function: (CI_OnLineFunctionCode) search
distributorTransferOptions: (MD_DigitalTransferOptions)
onLine: (CI_OnlineResource)
linkage: https://www.ncei.noaa.gov/maps/bathymetry/
protocol: HTTPS
name: Bathymetric Data Viewer
description: 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).
function: (CI_OnLineFunctionCode) search
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dataQualityInfo: (DQ_DataQuality)
scope: (DQ_Scope)
level: (MD_ScopeCode) repository
levelDescription: (MD_ScopeDescription)
other: NOAA National Centers for Environmental Information
lineage: (LI_Lineage)
processStep: (LE_ProcessStep)
description: 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.
dateTime:
DateTime: 2015-04-22T00:00:00
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dataQualityInfo: (DQ_DataQuality)
scope: (DQ_Scope)
level: (MD_ScopeCode) dataset
report: (DQ_AbsoluteExternalPositionalAccuracy)
nameOfMeasure: Horizontal Positional Accuracy Report
evaluationMethodDescription: 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. SRTM topography: 20 meters. Positional accuracy of input topographic datasets limits accuracy of corresponding cell values in DEM. DEM cell-value relative-contribution factors: SRTM: 10. Bathymetry: 10 meters to hunders of few kilometers. Positional accuracy of input bathymetric datasets limits accuracy of corresponding cell values in DEM. NGDC multibeam sonar : about 10 meters. Estimated depths derived from satellite imagery: about 23 meters. Trackline surveys are limited by sparseness of deep-water soundings : hundreds to a few kilometers. Where present, multibeam sonar supplant trackline sounding data values in the DEM. DEM cell-value relative-contribution factors: digitized features" 1,000, multibeam sonar: 100, estimated depths derived from satellite imagery: 100, trackline soundings: 1.
result: (missing)
report: (DQ_AbsoluteExternalPositionalAccuracy)
nameOfMeasure: Vertical Positional Accuracy Report
evaluationMethodDescription: 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. SRTM topography: 10 and 16 meters. Vertical accuracy of input topographic datasets limits accuracy of corresponding cells in DEM. DEM cell relative-contribution factors: SRTM: 10. Bathymetry: 1 meters to 5% of water depth. Vertical accuracy of input bathymetric datasets limits accuracy of corresponding cells in DEM. NGDC multibeam sonar: about 0.1 meter. Estimated depths derived from satellite imagery: 86.5% of water depth. Trackline soundings are limited by sparseness of deep-water soundings : tens of meters to 5% of water depth. Where present, multibeam sonar survey data supersede trackline sounding data values in DEM. DEM cell relative-contribution factors: multibeam sonar: 100, estimate depths derived from satellite imagery: 100 trackline soundings: 1. Gridding interpolation to determine cell values between sparse soundings in deep water degrades the vertical accuracy of deep-water elevations.
result: (missing)
report: (DQ_CompletenessCommission)
evaluationMethodDescription: NGDC made every effort to obtain all available digital topographic and bathymetric datasets in the region for use in building the DEM.
result: (unknown)
report: (DQ_ConceptualConsistency)
measureDescription: 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.
result: (unknown)
lineage: (LI_Lineage)
processStep: (LE_ProcessStep)
description: All datasets obtained by NGDC were converted to common horizontal and vertical datums of WGS 84 geographic and Mean High Water, respectively, using FME. They were also converted to common file format, ESRI point shapefiles, for visualization and inspection.
dateTime:
DateTime: 2009-03-17T00:00:00
processor: (CI_ResponsibleParty)
individualName: Barry W. Eakins
organisationName: NOAA National Centers for Environmental Information
positionName: Research Scientist
contactInfo: (CI_Contact)
phone: (CI_Telephone)
voice: 303-497-6505
address: (CI_Address)
deliveryPoint: 325 Broadway, E/GC3
city: Boulder
administrativeArea: Colorado
postalCode: 80305-3328
country: USA
electronicMailAddress: Barry.Eakins@noaa.gov
hoursOfService: 9am-5pm, M-F, Mountain Time
contactInstructions: Contact Marine Geology and Geophysics Division
role: (CI_RoleCode) pointOfContact
processStep: (LE_ProcessStep)
description: Datasets were visually inspected with ArcGIS for identification and editing of data anomalies. Datasets were then compared with overlapping datasets to ensure data consistency.
dateTime:
DateTime: 2009-04-10T00:00:00
processStep: (LE_ProcessStep)
description: 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.
dateTime:
DateTime: 2009-04-30T00:00:00
processStep: (LE_ProcessStep)
description: 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.
dateTime:
DateTime: 2009-05-07T00:00:00
processStep: (LE_ProcessStep)
description: The DEM was quantitatively evaluated by comparing with source datasets. 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.
dateTime:
DateTime: 2009-06-04T00:00:00
source: (LI_Source)
description: Source Contribution: Topography data for Midway Atoll. ; Source Type: online
sourceCitation: (CI_Citation)
title: Shuttle Radar Topography Mission (SRTM)
date: (CI_Date)
date: 2008-01-01
dateType: (CI_DateTypeCode) publication
citedResponsibleParty: (CI_ResponsibleParty)
organisationName: NASA > National Aeronautics and Space Administration
role: (CI_RoleCode) originator
citedResponsibleParty: (CI_ResponsibleParty)
organisationName: (inapplicable)
contactInfo: (CI_Contact)
onlineResource: (CI_OnlineResource)
linkage: https://lta.cr.usgs.gov/SRTM1Arc
name: Shuttle Radar Topography Mission
description: global topography
function: (CI_OnLineFunctionCode) download
role: (inapplicable)
sourceExtent: (EX_Extent)
temporalElement: (EX_TemporalExtent)
extent:
TimeInstant:
timePosition: 2000-01-01
source: (LI_Source)
description: Source Contribution: Multibeam data for Midway Atoll. ; Source Type: online
sourceCitation: (CI_Citation)
title: NGDC Multibeam Bathymetry Database
date: (CI_Date)
date: 2008-01-01
dateType: (CI_DateTypeCode) publication
citedResponsibleParty: (CI_ResponsibleParty)
organisationName: NOAA National Geophysical Data Center
role: (CI_RoleCode) originator
citedResponsibleParty: (CI_ResponsibleParty)
organisationName: (inapplicable)
contactInfo: (CI_Contact)
onlineResource: (CI_OnlineResource)
linkage: https://www.ngdc.noaa.gov/mgg/bathymetry/multibeam.html
name: NGDC Multibeam Bathymetry Database
description: Multibeam swath sonar survey data
function: (CI_OnLineFunctionCode) download
role: (inapplicable)
sourceExtent: (EX_Extent)
temporalElement: (EX_TemporalExtent)
extent:
TimePeriod:
beginPosition: 1992-01-01
endPosition: 2005-01-01
source: (LI_Source)
description: Source Contribution: Trackline data for Midway Atoll. ; Source Type: downloaded from website
sourceCitation: (CI_Citation)
title: NGDC Marine Geophysical Trackline Database
date: (CI_Date)
date: 2008-01-01
dateType: (CI_DateTypeCode) publication
citedResponsibleParty: (CI_ResponsibleParty)
organisationName: NOAA National Geophysical Data Center
role: (CI_RoleCode) originator
citedResponsibleParty: (CI_ResponsibleParty)
organisationName: (inapplicable)
contactInfo: (CI_Contact)
onlineResource: (CI_OnlineResource)
linkage: https://www.ngdc.noaa.gov/mgg/geodas/trackline.html
name: NGDC Marine Geophysical Trackline Database
description: Marine geophyscical trackline data
function: (CI_OnLineFunctionCode) download
role: (inapplicable)
sourceExtent: (EX_Extent)
temporalElement: (EX_TemporalExtent)
extent:
TimePeriod:
beginPosition: 1961-01-01
endPosition: 1991-01-01
source: (LI_Source)
description: Source Contribution: Provided depths for the shallow water around Midway Atoll. ; Source Type: provided as xyz files from Richard Olsen
sourceCitation: (CI_Citation)
title: Estimated Depths derived from IKONOS Satellite Imagery
date: (CI_Date)
date: 2006-01-01
dateType: (CI_DateTypeCode) publication
citedResponsibleParty: (CI_ResponsibleParty)
organisationName: NPS > Naval Postgraduate School
role: (CI_RoleCode) originator
citedResponsibleParty: (CI_ResponsibleParty)
organisationName: (inapplicable)
contactInfo: (CI_Contact)
onlineResource: (CI_OnlineResource)
linkage: http://www.nps.edu/
name: Depth Analysis of Midway Atoll Using Quickbird Multi-Spectral Imaging over Variable Substrates
description: Master Thesis by Mark Camacho
function: (CI_OnLineFunctionCode) information
role: (inapplicable)
sourceExtent: (EX_Extent)
temporalElement: (EX_TemporalExtent)
extent:
TimePeriod:
beginPosition: 2004-01-01
endPosition: 2006-01-01
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metadataMaintenance: (MD_MaintenanceInformation)
maintenanceAndUpdateFrequency: (MD_MaintenanceFrequencyCode) asNeeded
maintenanceNote: Modified for compliance to NCEI Template v1.2.
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acquisitionInformation: (MI_AcquisitionInformation)
instrument: (MI_Instrument)
identifier: (inapplicable)
type: Multibeam Swath Bathymetry System
operation: (MI_Operation)
identifier: (MD_Identifier)
code: Tsunami Inundation Gridding Project
status: (missing)
parentOperation: (inapplicable)
platform: (MI_Platform)
identifier: (MD_Identifier)
code: Digital Elevation Models
description: (missing)
instrument: (missing)