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  • Portland, Maine 1/3 arc-second MHW Coastal Digital Elevation Model

    Metadata Updated: November 18, 2018

    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 (WGS84). Grid spacings for the DEMs range from 1/3 arc-second (~10 meters) to 3 arc-seconds (~90 meters).

    Access & Use Information

    License: U.S. Government Work

    Downloads & Resources

    Dates

    Metadata Date November 30, 2017
    Metadata Created Date September 27, 2015
    Metadata Updated Date November 18, 2018
    Reference Date(s) December 31, 2008 (publication)
    Frequency Of Update asNeeded

    Metadata Source

    Harvested from NOAA CSW Harvest Source

    Graphic Preview

    Perspective view of DEM

    Additional Metadata

    Resource Type Dataset
    Metadata Date November 30, 2017
    Metadata Created Date September 27, 2015
    Metadata Updated Date November 18, 2018
    Reference Date(s) December 31, 2008 (publication)
    Responsible Party DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce (Point of Contact)
    Contact Email
    Access Constraints 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.
    Bbox East Long -69.63
    Bbox North Lat 43.99
    Bbox South Lat 43.00
    Bbox West Long -70.74
    Coupled Resource
    Frequency Of Update asNeeded
    Graphic Preview Description Perspective view of DEM
    Graphic Preview File https://gis.ngdc.noaa.gov/arcgis/rest/services/DEM_global_mosaic_hillshade/ImageServer/exportImage?bbox=-70.74,43.00,-69.63,43.99&size=300,300&format=png32&interpolation=%20RSP_BilinearInterpolation&renderingRule=%7B%22rasterFunction%22:%22ColorHillshade%22%7D&f=image
    Graphic Preview Type JPEG
    Guid gov.noaa.ngdc.mgg.dem:606
    Harvest Object Id 4538b1b7-69e5-4aa9-abf5-9e3ee60cffc1
    Harvest Source Id 2aed8e29-fc5b-4cde-aa66-fb1118fd705e
    Harvest Source Title NOAA CSW Harvest Source
    Licence 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.
    Metadata Language
    Metadata Type geospatial
    Progress completed
    Spatial Data Service Type ArcGIS Image Service
    Spatial Reference System urn:ogc:def:crs:EPSG::4326
    Spatial Harvester True
    Temporal Extent Begin 1861-01-01
    Temporal Extent End 2007-01-01

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