gov.noaa.ngdc.mgg.dem:737 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 2022-03-25 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) 3 row 541 0.0014814815 column 1216 0.0014814815 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 Akutan, Alaska 8/15 Arc-second Coastal Digital Elevation Model 2009-04-20 publication First NOAA National Centers for Environmental Information NCEI Metadata ID: gov.noaa.ngdc.mgg.dem:737 NOAA National Centers for Environmental Information publisher NOAA National Geophysical Data Center author mapDigital NTHMP DEMs Akutan, Alaska 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 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/737.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 2024 revision 19 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2024. GCMD Keywords, Version 19. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian Models/Analyses > DEM > Digital Elevation Model platform Global Change Master Directory (GCMD) Platform Keywords 2020-01-09 publication 9.1 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2024. GCMD Keywords, Version 19. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian 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 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2024. GCMD Keywords, Version 19. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian < 1 meter dataResolution Global Change Master Directory (GCMD) Vertical Data Resolution Keywords 2020-01-09 publication 9.1 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2024. GCMD Keywords, Version 19. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+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 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 2024 revision 19 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2024. GCMD Keywords, Version 19. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian Akutan 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 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2024. GCMD Keywords, Version 19. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+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: Akutan, Alaska 8/15 Arc-second Coastal Digital Elevation Model. NOAA National Centers for Environmental Information. Accessed [date]. Data Stewardship Maturity Report for Akutan, Alaska 8/15 arc-second Coastal Digital Elevation Model 2022 publication NOAA Institutional Repository publisher https://doi.org/10.25923/mqgp-4d76 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 Models of Akutan, Alaska: Procedures, Data Sources, and Analysis 2009-04-20 publication DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce Boulder CO publisher Elliot Lim originator Barry W. Eakins originator R. Jason Caldwell originator https://www.ngdc.noaa.gov/mgg/dat/dems/regional_tr/akutan_815_mhhw_2009.pdf Digital Elevation Model of Akutan, Alaska: Procedures, Data Sources and Analysis Report describing the development of the Akutan, Alaska 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 -165.85 -165.67 54.09 54.17 1896-01-01 2008-01-01 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 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2024. GCMD Keywords, Version 19. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+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 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2024. GCMD Keywords, Version 19. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+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 1 netCDF WINZIP netCDF 4 Classic https://www.ncei.noaa.gov/metadata/geoportal/rest/metadata/item/gov.noaa.ngdc.mgg.dem:737/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 https://www.ngdc.noaa.gov/thredds/dodsC/regional/akutan_815_mhhw_2009.nc.html OPeNDAP:OPeNDAP OPeNDAP Dataset Access Form download https://www.ngdc.noaa.gov/thredds/fileServer/regional/akutan_815_mhhw_2009.nc HTTPS Download NetCDF File download https://www.ngdc.noaa.gov/thredds/wcs/regional/akutan_815_mhhw_2009.nc?service=WCS&version=1.0.0&request=GetCapabilities OGC:WCS Web Coverage Service GetCapabilities information https://www.ngdc.noaa.gov/thredds/wms/regional/akutan_815_mhhw_2009.nc?service=WMS&version=1.3.0&request=GetCapabilities OGC:WMS Web Map Service GetCapabilities information https://www.ngdc.noaa.gov/thredds/ncss/regional/akutan_815_mhhw_2009.nc/dataset.html HTTPS Download a subset of the NetCDF download https://www.ngdc.noaa.gov/thredds/ncml/regional/akutan_815_mhhw_2009.nc?catalog=https%3A%2F%2Fwww.ngdc.noaa.gov%2Fthredds%2Fcatalog%2Fregional%2Fcatalog.html&dataset=regionalDatasetScan%2Fakutan_815_mhhw_2009.nc HTTPS 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 cell size and the accuracy of the input datasets used to determine corresponding cell values. 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: NED: 100, SRTM: 10. Bathymetry: several hundred meters. Positional accuracy of input bathymetric datasets limits accuracy of corresponding cell values in DEM. NOS, NOS hydrographic LiDAR and USACE surveys (primarily in dredged shipping channels): 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. Morphologic change in inland rivers and along the coast also degrades the positional accuracy of NOS soundings. Where present, hydrographic LiDAR and USACE survey data supplant NOS hydrographic sounding data values in the DEM. DEM cell-value relative-contribution factors: ENC soundings: 100, USACE surveys: 100, NOS hydrographic soundings: 10, NGDC multibeam sonar surveys: 10, Trackline soundings: 0.1. 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. USGS NED DEM: 7 and 15 meters. SRTM DEM: 16 meters. DEM cell relative-contribution factors: SRTM: 10 NED: 100. Bathymetry: 2 meters to 5% of water depth. Vertical accuracy of input bathymetric datasets limits accuracy of corresponding cells in DEM. GPS-navigated NOS, NOS hydrographic LiDAR and USACE surveys (primarily in dredged shipping channels): 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, USACE survey data supersede NOS hydrographic sounding data values in DEM. DEM cell-value relative-contribution factors: ENC soundings: 100, USACE surveys: 100, NOS hydrographic soundings: 10, NGDC multibeam sonar surveys: 10, Trackline soundings: 0.1. 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. 2009-01-15T00:00:00 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 for identification and editing of data anomalies. Datasets were then compared with overlapping datasets to ensure data consistency. 2009-01-29T00:00:00 xyz files of the bathymetric data were surfaced using GMT's 'surface' tool onto a 8/15 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. 2009-02-12T00:00:00 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 with a 5% data buffer. The grid was imported in ArcGIS to create the final DEM. 2009-02-26T00:00:00 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. 2009-03-12T00:00:00 Source Contribution: hydrographic surveys downloaded from web site. ; Source Type: online NOS Hydrographic Surveys 2009-01-01 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 1896-01-01 2002-01-01 Source Contribution: downloaded from web site. ; Source Type: online Electronic Navigational Charts 2009-01-01 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 2009-01-01 Source Contribution: multibeam surveys downloaded from web site. ; Source Type: online NGDC Multibeam Surveys 2009-01-01 publication DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce originator https://www.ngdc.noaa.gov/mgg/bathymetry/multibeam.html NGDC Multibeam Survey Database Digital database of NGDC multibeam surveys. download 1999-01-01 2004-01-01 Source Contribution: Trackline surveys downloaded from web site. ; Source Type: online NGDC Trackline Surveys 2009-01-01 publication DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce originator https://www.ngdc.noaa.gov/mgg/geodas/trackline.html NGDC Trackline Survey Database Digital database of NGDC Trackline surveys. download 1913-01-01 1991-01-01 Source Contribution: gridded topographic data ; Source Type: online USGS NED topography 2009-01-01 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 2006-01-01 Source Contribution: gridded topographic data downloaded from web site. ; Source Type: on web Shuttle Radar Topography Mission (SRTM) 2009-01-01 publication NASA > National Aeronautics and Space Administration originator https://lta.cr.usgs.gov/SRTM1Arc Shuttle Radar Topography Mission global topography download 2000-01-01 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 2016-06-21T00:00:00 optimal advanced intermediate advanced intermediate intermediate minimal minimal intermediate Akutan_AK_8_15s_MHHW_DEM 2016-06-21 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. asNeeded Modified for compliance to NCEI Template v1.2. Light Detection and Ranging Multibeam Swath Bathymetry System Sound Navigation and Ranging NTHMP DEM Gridding Project Digital Elevation Model