gov.noaa.ngdc.mgg.dem:11508 eng; USA utf8 dataset NOAA National Centers for Environmental Information DEM Information dem.info@noaa.gov pointOfContact 2017-11-30 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) 3 row 405 0.00014814815 column 675 0.00014814815 vertical 1 area true World Geodetic System 1984 WGS 84 2007-08-27 revision http://www.epsg-registry.org/export.htm?gml=urn:ogc:def:crs:EPSG::4326 WGS 84 GML of World Geodetic System 1984 coordinate reference system. information resourceProvider European Petroleum Survey Group http://www.epsg-registry.org/ 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 http://www.epsg-registry.org/export.htm?gml=urn:ogc:def:crs:EPSG::5869 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 http://www.epsg-registry.org/ 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 Port Lions, Alaska 8/15 arc-second MHHW Coastal Digital Elevation Model 2016-08-26 publication First NOAA National Centers for Environmental Information publisher NOAA National Centers for Environmental Information originator DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce originator National Tsunami Hazard Mitigation Program (NTHMP) collaborator mapDigital NTHMP DEMs Port Lions, Alaska 8/15 arc-second NOAA's National Centers for Environmental Information is building high-resolution digital elevation models (DEMs) to support individual coastal States as part of the National Tsunami Hazard Mitigation Program's (NTHMP) efforts to improve community preparedness and hazard mitigation. These integrated bathymetric-topographic DEMs are used to support tsunami and coastal inundation mapping. Bathymetric, topographic, and shoreline data used in DEM compilation are obtained from various sources, including NGDC, the U.S. National Ocean Service (NOS), the U.S. Geological Survey (USGS), the U.S. Army Corps of Engineers (USACE), the Federal Emergency Management Agency (FEMA), and other federal, state, and local government agencies, academic institutions, and private companies. DEMs are referenced to various vertical and horizontal datums depending on the specific modeling requirements of each State. For specific datum information on each DEM, refer to the appropriate DEM documentation. Cell sizes also vary depending on the specification required by modelers in each State, but typically range from 8/15 arc-second (~16 meters) to 8 arc-seconds (~240 meters). Developed for the University of Alaska at Fairbanks (UAF), Geophysical Institute for tsunami and coastal inundation modeling efforts for the State of Alaska. completed NOAA National Centers for Environmental Information DEM Information dem.info@noaa.gov pointOfContact asNeeded 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 and Services Keywords Models/Analyses > DEM > Digital Elevation Model platform Global Change Master Directory (GCMD) Platform Keywords 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://earthdata.nasa.gov/about/gcmd/global-change-master-directory-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 < 1 meter dataResolution Global Change Master Directory (GCMD) Vertical Data Resolution Keywords Continent > North America > United States of America >Alaska Vertical Location > Land Surface Vertical Location > Sea Floor place Global Change Master Directory (GCMD) Location Keywords Coastal Relief Gridded elevations Integrated bathymetry and topography theme Uncontrolled Port Lions Kodiak Island Settler Cove Alaska Kizhuyak Bay 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://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information custodian Not to be used for navigation. Although these data are of high quality and useful for planning and modeling purposes, they are not suitable for navigation. For navigation, please refer to the NOS nautical chart series. Produced by the NOAA National Centers for Environmental Information. Not subject to copyright protection within the United States. otherRestrictions Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives. NTHMP DEM Project 2009-12-01 publication NOAA National Centers for Environmental Information custodian Citation URL https://maps.ngdc.noaa.gov/viewers/bathymetry/?layers=dem 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 Citation URL https://www.ngdc.noaa.gov/mgg/coastal HTTPS DEM text search Text search for locating completed and planned DEMs. search mapDigital NOAA Coastal Inundation DEMs Named by primary coastal city, state in DEM. NOAA's National Centers for Environmental Information (NCEI) is building high-resolution digital elevation models (DEMs) to support individual coastal States as part of the National Tsunami Hazard Mitigation Program (NTHMP) effort 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 NCEI, 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). largerWorkCitation Digital Elevation Model of Port Lions, Alaska: Procedures, Data Sources and Analysis 2016-08-29 publication NOAA National Centers for Environmental Information publisher NOAA National Centers for Environmental Information DEM Information dem.info@noaa.gov pointOfContact Citation URL https://www.ngdc.noaa.gov/mgg/dat/dems/regional_tr/port_lions_815_mhhw_2016.pdf Digital Elevation Model of Port Lions, Alaska: Procedures, Data Sources and Analysis Report describing the development of the Port Lions, Alaska DEM download 6 pages crossReference userGuide grid eng; USA elevation Native Dataset Environment: Microsoft Windows 2008 Service Pack 1; ESRI ArcGIS 10.1.1.3143 ISO valid extents for Port Lions 8/15 sec. DEM -152.92 -152.82 57.84 57.90 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://ngdc.noaa.gov/mgg/coastal/coastal.html HTTPS Integrated Models of Coastal Relief 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=feb3c625dc094112bb5281c17679c769 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 The DEM Global Mosaic is an image service providing access to bathymetric/topographic digital elevation models stewarded at NOAA's National Centers for Environmental Information (NCEI), along with the global GEBCO_2014 grid: http://www.gebco.net/data_and_products/gridded_bathymetry_data. 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). 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 map service: https://noaa.maps.arcgis.com/home/item.html?id=d41f39c8a6684c54b62c8f1ab731d5ad for polygon footprints and more information about the individual DEMs used to create this composite view. In this visualization, the elevations/depths are displayed using this color ramp: https://gis.ngdc.noaa.gov/viewers/images/dem_color_scale.png. 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://earthdata.nasa.gov/about/gcmd/global-change-master-directory-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 (Elevation Values) https://gis.ngdc.noaa.gov/arcgis/rest/services/DEM_mosaics/DEM_global_mosaic/ImageServer ESRI:ArcGIS ESRI image rest 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 Digital Elevation Model Footprints ArcGIS Map Service 2011-02-15 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 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=d41f39c8a6684c54b62c8f1ab731d5ad HTTPS NOAA GeoPlatform Entry for Digital Elevation Model Footprints NOAA GeoPlatform listing for Digital Elevation Model Footprints ArcGIS Map Service 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 ESRI:ArcGIS NOAA GeoPlatform Entry for DEM Global Mosaic (Color Shaded Relief) Color shaded relief visualization of a global seamless bathymetry/topography mosaic of digital elevation models at NOAA/NCEI. search 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 ESRI:ArcGIS DEM Global Mosaic (Elevation Values) A global seamless bathymetry/topography mosaic of digital elevation models at NOAA/NCEI. search 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://earthdata.nasa.gov/about/gcmd/global-change-master-directory-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 Map Service 10.7 1 -180 180 -90 90 tight ArcGIS for Server REST endpoint for dynamic map service https://maps.ngdc.noaa.gov/arcgis/rest/services/dem_extents/MapServer HTTPS ESRI Map Rest Specification Digital Elevation Model Footprints ArcGIS Dynamic Map Service REST endpoint for Digital Elevation Model Footprints ArcGIS dynamic map service search WMS Get Capabilities https://maps.ngdc.noaa.gov/arcgis/services/dem_extents/MapServer/WMSServer?request=GetCapabilities&service=WMS OGC:WMS http://opengis.net/spec/wms Digital Elevation Model Footprints Web Map Service (WMS) Capabilities document for Open Geospatial Consortium Web Map Service for Digital Elevation Model Footprints search netCDF 4 Classic NOAA National Centers for Environmental Information DEM Information dem.info@noaa.gov pointOfContact https://www.ngdc.noaa.gov/thredds/dodsC/regional/port_lions_815_mhhw_2016.nc.html OPeNDAP:OPeNDAP OPeNDAP Dataset Access Form OPeNDAP Dataset Access Form download https://www.ngdc.noaa.gov/thredds/fileServer/regional/port_lions_815_mhhw_2016.nc HTTPS Download NetCDF File Download NetCDF File download https://www.ngdc.noaa.gov/thredds/wcs/regional/port_lions_815_mhhw_2016.nc?service=WCS&version=1.0.0&request=GetCapabilities OGC:WCS Web Coverage Service GetCapabilities Web Coverage Service GetCapabilities information https://www.ngdc.noaa.gov/thredds/wms/regional/port_lions_815_mhhw_2016.nc?service=WMS&version=1.3.0&request=GetCapabilities OGC:WMS Web Map Service GetCapabilities Web Map Service GetCapabilities information https://www.ngdc.noaa.gov/thredds/ncss/regional/port_lions_815_mhhw_2016.nc/dataset.html HTTPS Download a subset of the NetCDF Download a subset of the NetCDF download https://www.ngdc.noaa.gov/thredds/ncml/regional/port_lions_815_mhhw_2016.nc?catalog=https%3A%2F%2Fwww.ngdc.noaa.gov%2Fthredds%2Fcatalog%2Fregional%2Fcatalog.html&dataset=regionalDatasetScan%2Fport_lions_815_mhhw_2016.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 DEM cell size and the accuracy of the input datasets used to determine corresponding cell values. Topography: 10 to 30 meters. Positional accuracy of input topographic datasets limits accuracy of corresponding cell values in DEM. SRTM topography: 15 to 30 meters, DCRA topography: ~7 meters, GPS: less than 5 meters. DEM cell-value relative-contribution factors: GPS: 1,000, DCRA: 100, SRTM: 1. Bathymetry: 15 meters. Positional accuracy of input bathymetric datasets limits accuracy of corresponding cell values in DEM. NOS survey data: from 1 meter to several kilometers, USACE digitized survey points: ~10 meters. DEM cell-value relative-contribution factors: NOS BAG survey: 1000, USACE: 1000, NOS non-bag survey: 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 30 meters. Vertical accuracy of input topographic datasets limits accuracy of corresponding cells in DEM. DEM cell-value relative-contribution factors: GPS: 1,000, DCRA: 10, SRTM: 1. Bathymetry: less than 1 meter to 5% of water depth. Vertical accuracy of input bathymetric datasets limits accuracy of corresponding cells in DEM. DEM cell-value relative-contribution factors: NOS BAG survey: 1000, USACE: 1000, NOS non-bag survey: 1. Gridding interpolation to determine cell values between sparse soundings in deep water degrades the vertical accuracy of corresponding elevations. NCEI 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 NCEI were converted to common horizontal and vertical datums of WGS 84 geographic and Mean Higher High Water, respectively, based on tide station information. They were also converted to common file format, ESRI point shapefiles, for visualization and inspection. 2016-07-10T00:00:00 Datasets were visually inspected with ArcGIS and Global Mapper for identification and editing of data anomalies. Datasets were then compared with overlapping datasets to ensure data consistency. 2016-07-20T00:00:00 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 5 meters along the coastline were also included to ensure that the bathymetric grid reached zero at the coast. The resulting Arc ASCII grid was imported into ArcGIS and clipped to the coastline to remove values over land. 2016-08-11T00:00:00 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. 2016-08-19T00:00:00 The DEM was quantitatively evaluated by comparing with source datasets. 2016-08-25T00:00:00 NOS hydrographic survey data NOS Hydrographic Surveys 2008-01-01 publication DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce originator Citation URL http://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 1933-01-01 2014-01-01 Tidal information table from which vertical datum adjustment information are interpreted Bench Mark Data Sheet with Tidal Datum References 2014-12-30 publication DOC/NOAA/NOS National Ocean Service, NOAA, U.S. Department of Commerce originator Citation URL http://tidesandcurrents.noaa.gov/station_retrieve.shtml Tides and Currents Station Selection Bench Mark Data Sheet for station # 9457391 information documentDigital 2009-07-01 2009-08-01 Gridded topographic data Shuttle Radar Topography Mission 1 Arc-Second Global: SRTM1N57W153V3 2014-09-23 publication NASA > National Aeronautics and Space Administration originator Citation URL http://earthexplorer.usgs.gov/ Shuttle Radar Topography Mission The Shuttle Radar Topography Mission (SRTM) was a partnership between NASA and the National Geospatial-Intelligence Agency (NGA). Flown aboard the NASA Space Shuttle Endeavour (11-22 February 2000), SRTM fulfilled its mission to map the world in three dimensions. The USGS is under agreement with NGA and NASA's Jet Propulsion Laboratory to distribute SRTM elevation products derived from the C-band radar data. SRTM utilized interferometric C-band Spaceborne Imaging Radar to generate elevation data over 80 percent of the Earth's land surface. Global SRTM data at a resolution of 1 arc-second have been edited to delineate and flatten water bodies, better define coastlines, remove spikes and wells, and fill small voids. Larger areas of missing data or voids were filled by the NGA using interpolation algorithms in conjunction with other sources of elevation data. The SRTM 1 Arc-Second Global data offer worldwide coverage of void filled data at a resolution of 1 arc-second (30 meters) and provide open distribution of this high-resolution global data set. download 2000-02-01 Digitized hydrographic survey for Port Lions Harbor USACE 2014-11-04 publication U.S. Army Corps of Engineers, Alaska District Constructions - Operations Division originator Citation URL http://www.poa.usace.army.mil/ Rivers and Harbors Project Information Hydrographic survey information download 2014-09-02 2014-09-07 GPS survey data obtained from UAF UAF Port Lions GPS 2015-11-19 publication University of Alaska at Fairbanks originator 2015-11-19 Topographic point data extracted from CAD data files DCRA CAD ortho photo derived topography 2007-01-01 publication State of Alaska, Division of Community and Regional Affairs (DCRA) originator 2008-05-27 annually 2018-08-29 Kelly Carignan NOAA National Centers for Environmental Information kelly.carignan@noaa.gov pointOfContact NOAA National Centers for Environmental Information Metadata Specialist editor Sound Navigation and Ranging NTHMP DEM Gridding Project Digital Elevation Model