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  • Portland, Maine Coastal Digital Elevation Model

    Metadata Updated: March 11, 2021

    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

    Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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    Dates

    Metadata Created Date March 11, 2021
    Metadata Updated Date March 11, 2021
    Data Update Frequency irregular

    Metadata Source

    Harvested from Commerce Non Spatial Data.json Harvest Source

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date March 11, 2021
    Metadata Updated Date March 11, 2021
    Publisher DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce (Point of Contact)
    Unique Identifier Unknown
    Maintainer
    Identifier gov.noaa.ngdc.mgg.dem:606
    Language en-US
    Data Last Modified 2008-12-31
    Public Access Level public
    Data Update Frequency irregular
    Bureau Code 006:48
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Old Spatial {"type": "Polygon", "coordinates": -70.74, 43.0, -69.63, 43.0, -69.63, 43.99, -70.74, 43.99, -70.74, 43.0}
    Program Code 006:059
    Source Datajson Identifier True
    Source Hash de31294b7e005186557a2187c617712f05b10aa8
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -70.74, 43.0, -69.63, 43.0, -69.63, 43.99, -70.74, 43.99, -70.74, 43.0}
    Temporal 1861-01-01T00:00:00/2007-01-01T00:00:00

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