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Yakutat, Alaska 3 arc-second DEM

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The 3-second Yakutat Alaska Elevation Grid provides bathymetric data in ASCII raster format of 3-second resolution in geographic coordinates. This grid is strictly for tsunami inundation modeling
Cite this dataset when used as a source.
Search Data
  • DEM text search tool (search)
    Text search tool for locating completed and planned DEMs.
  • Map Interface (search)
    Graphic geo-spatial search tool for locating completed and planned DEMs.
Distribution Formats
  • ESRI Arc ASCII (Version: 1)
    • File Specification: ASCII text version of ESRI ArcGIS raster format
    • File Compression: WINZIP
Distributor DEM Information
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
Dataset Publisher NOAA Center for Tsunami Research
NOAA/PMEL/Center for Tsunami Research (NCTR)
Documentation links not available.
  • publication: 2003-09-02
Edition: 2003
Data Presentation Form: mapDigital
Dataset Progress Status Complete
Data Update Frequency: Irregular
Supplemental Information:
This grid was developed through funding from the National Tsunami Hazard Mitigation Program. It will be updated as better data become available.
Purpose: This grid was constructed for use in tsunami inundation modeling
Use Limitations
  • 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 Geophysical Data Center. Not subject to copyright protection within the United States.
  • While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
  • NOAA/PMEL/Center for Tsunami Research (NCTR)
Time Period: 2003-07-01 to 2003-08-01
Spatial Reference System: urn:ogc:def:crs:EPSG::4326
Spatial Bounding Box Coordinates:
N: 59.73
S: 59.33
E: -139.5
W: -140
Theme keywords NASA/GCMD Platform Keywords
  • Models/Analyses > DEM > Digital Elevation Model
NASA/GCMD Data Resolution Keywords
  • 1 meter - < 30 meters
  • < 1 meter
  • Coastal Relief
  • Gridded elevations
Global Change Master Directory (GCMD) Science and Services Keywords
Data Center keywords Global Change Master Directory (GCMD) Data Center Keywords
  • 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
Place keywords Global Change Master Directory (GCMD) Location Keywords
  • Continent > North America > United States of America > Alaska
  • Ocean > Pacific Ocean
  • Vertical Location > Land Surface
  • Vertical Location > Sea Floor
  • Southeast Alaska
  • Alaska
  • Gulf of Alaska
  • Yakutat
Project keywords Global Change Master Directory (GCMD) Project Keywords
  • ICSU-WDS > International Council for Science - World Data System
  • Earth Science > Oceans > Bathymetry/Seafloor Topography > Seafloor Topography
  • Earth Science > Oceans > Bathymetry/Seafloor Topography > Bathymetry
  • Earth Science > Oceans > Bathymetry/Seafloor Topography > Water Depth
Use Constraints No constraint information available
Fees Fee information not available.
Lineage information for: repository
Processing Steps
  • 2015-04-22T00:00:00 - 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.
Lineage information for: dataset
  • NOAA/PMEL/Center for Tsunami Research (NCTR)
  • NOAA/PMEL/Center for Tsunami Research (NCTR)
Processing Steps
  • 2003-09-02T00:00:00 - Each raw data source was converted into ESRI Arc-compatible formats. The resulting files were converted and adjusted to predetermined projection (geographic), horizontal datum (NAD27), and vertical datum (MHW) using the ArcInfo PROJECT command and ArcView Spatial Analyst MAP CALCULATOR algorithm. An ArcView polyline shapefile was created to represent the coastline. The coastline is based on USGS hydrographic vectors. The USGS coastline was compared to high-resolution NGS vector shoreline; no discernible difference was found between the two datasets. Bathymetric contours and data points were digitized from raster charts and images. Each dataset was analyzed for quality. Anomalies were removed; approximately 30 points were removed from NOS hydrographic survey datasets. Overlapping contours and points were assessed for matching. Bathymetric data was prioritized by quality and date. Recent surveys superseded older data. A TIN (Triangulated Irregular Network) was created using bathymetric data and coastline vectors using ArcView 3D Spatial Analyst. A 0.88-arcsecond grid was created. The grid was contoured at 1-, and 5-meter contours to compare with the original datasets. Problematics areas were redone by adding additional contours in areas of low point density. The bathymetric grid was clipped to requested coordinates. USGS 30-meter DEMs were merged into a single grid and analyzed for quality. The dataset was compare to hydrographic and hypsographic contours, as well as USGS, NGS, and COOPs control points. Problematics areas (airport, grid overlaps) were redone by creating TINs using source data. The topographic grid was clipped to requested coordinates. The topographic and bathymetric grids were merged into a single 0.88-arcsecond grid. The 0.88-second grid was compared to the Yakutat AK 2.66-second grid to ensure continuity and quality. A gridmatching graphic (yak3_1.jpg) was produced to verify nest matching for modeling efforts. The final grid was analyzed for blunders, systematic errors, and logical consistency.
  • 2008-11-04T00:00:00 - Metadata imported.
Processing Environment Native Dataset Environment: Microsoft Windows 2000 Version 5.2 (Build 3790) Service Pack 2; ESRI ArcCatalog
Source Datasets
  • water level station data, tidal datums
  • global relief, hydrographic surveys, bathymetric maps
    • Description of Source: bathymetric elevation values and contours
    • Temporal extent used: 1938-01-01 to 1999-01-01
  • hypsographic and hydrographic vector data and dems
    • Description of Source: shoreline vector contours, elevations, control points
    • Temporal extent used: 1974-01-01 to 1986-01-01
Last Modified: 2017-03-29
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