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Garibaldi, Oregon Coastal Digital Elevation Model

browse graphicPerspective view of DEM
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 warning 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 a variety of vertical datums and horizontal datum of World Geodetic System of 1984 (WGS84). Cell size for the DEMs ranges from 1/3 arc-second (~10 meters) to 3 arc-seconds (~90 meters).

Cite this dataset when used as a source.

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Distribution Formats
  • ESRI Arc ASCII (Version: 2)
    • File Compression: WINZIP
Distributor DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
Point of Contact DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
dem.info@noaa.gov
General Documentation
Associated Resources
  • NOAA Tsunami Inundation Gridding Project
  • Digital Elevation Models of Garibaldi, Oregon: Data Sources, Processing and Evaluation
Originator
  • DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
Publisher
  • DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
Date(s)
  • publication: 2013-01-14
Edition: Second
Data Presentation Form: mapDigital
Dataset Progress Status Complete
Data Update Frequency: As needed
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.
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.
Time Period: 1877-01-01  to  2012-01-01
Spatial Reference System: urn:ogc:def:crs:EPSG::4326 urn:ogc:def:datum:EPSG::5103
Spatial Bounding Box Coordinates:
N: 45.90
S: 45.10
E: -123.70
W: -124.50
Spatial Coverage Map:
Themes
  • 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 > Topographical Relief
  • Earth Science > Oceans > Coastal Processes > Coastal Elevation
  • DEM > Digital Elevation Model
  • DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
  • WDC/MGG, BOULDER > World Data Center for Marine Geology and Geophysics, Boulder
  • H: 1 meter - < 30 meters
  • V: < 1 meter
  • Coastal Relief
  • Gridded elevations
  • Integrated bathymetry and topography
  • 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
  • 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
Places
  • Continent > North America > United States of America > Oregon
  • Ocean > Pacific Ocean > North Pacific Ocean
  • Vertical Location > Land Surface
  • Vertical Location > Sea Floor
  • Garibaldi
  • Tillamook Bay
  • Oregon
Use Constraints No constraint information available
Fees Fee information not available.
Source Datasets
  • NOS Hydrographic Surveys
  • NOAA NOS High-Resolution Multibeam Bathymetry Surveys (BAG)
  • OSU Multibeam Bathymetry
  • USACE JALBTCX Topo-Bathy Lidar
  • DOGAMI Topographic Lidar (North Coast and Yambo Study Area)
  • ODF Topographic Lidar
  • USGS NED topography
  • VDatum software v3.0
Lineage Statement Lineage statement not available.
Processor
  • DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
Processing Steps
  • All datasets obtained by NGDC were converted to a common ASCII XYZ file format. Additionally, common horizontal and vertical datums of WGS84 geographic and the North American Vertical Datum of 1988 (NAVD88) were established using the Proj4 Cartographic Projections Library and transformation grids derived from NOAA VDatum software.
  • The data were visually inspected with Fledermaus and ArcGIS for identification and editing of data anomalies. Datasets were compared with overlapping datasets to ensure data consistency. In some cases, overlapping data were edited to ensure a smooth transition between adjacent datasets.
  • A 1/3 arc-second bathymetric 'pre-surface' was created using GMT's 'surface' tool in order to interpolate or extrapolate values where data coverage was sparse or non-existent. In order to ensure realistic inter/extrapolated values, two such grids were created, one for the 'open ocean' coast and another for bays/estuaries. Different upper limits (of depths) were imposed for each grid created. The final mosaiced grid was clipped to the shoreline to remove depths over land. The grid was then converted to an ASCII XYZ file to serve as an input in the final integrated topo-bathy surface.
  • ASCII 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.
  • The DEM was reviewed qualitatively for any noticeable artifacts introduced during the gridding process using imagery and other ancillary data. The DEM was also quantitatively evaluated by comparing it with source datasets and with elevation values extracted from NGS geodetic monuments.

Metadata Last Modified: 2013-01-14

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