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    • Nantucket, Massachusetts 1/3 arc-second MHW Coastal Digital Elevation Model

    Metadata Updated: October 18, 2024

    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: 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.

    Downloads & Resources

    Dates

    Metadata Date March 25, 2022
    Metadata Created Date October 18, 2024
    Metadata Updated Date October 18, 2024
    Reference Date(s) October 10, 2008 (publication)
    Frequency Of Update asNeeded

    Metadata Source

    Harvested from NGDC MGG DEM

    Other Data Resources

    Graphic Preview

    Thumbnail of DEM

    Additional Metadata

    Resource Type Dataset
    Metadata Date March 25, 2022
    Metadata Created Date October 18, 2024
    Metadata Updated Date October 18, 2024
    Reference Date(s) October 10, 2008 (publication)
    Responsible Party NOAA National Centers for Environmental Information (Point of Contact)
    Contact Email
    Guid gov.noaa.ngdc.mgg.dem:385
    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., Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose., Cite as: NOAA National Geophysical Data Center. 2008: Nantucket, Massachusetts 1/3 arc-second MHW Coastal Digital Elevation Model. NOAA National Centers for Environmental Information. Accessed [date].
    Bbox East Long -69.49
    Bbox North Lat 41.71
    Bbox South Lat 40.81
    Bbox West Long -70.67
    Coupled Resource
    Frequency Of Update asNeeded
    Graphic Preview Description Thumbnail of DEM
    Graphic Preview File https://maps.ngdc.noaa.gov/thumbnails/DEM/385.png
    Graphic Preview Type PNG
    Harvest Object Id 3ead229f-bd72-44ba-b28a-e494d9069733
    Harvest Source Id 4969dc3d-1269-48b4-a254-dfee8489c5c9
    Harvest Source Title NGDC MGG DEM
    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 Centers for Environmental Information. Not subject to copyright protection within the United States.
    Lineage
    Metadata Language
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[-70.67, 40.81], [-69.49, 40.81], [-69.49, 41.71], [-70.67, 41.71], [-70.67, 40.81]]]}
    Progress completed
    Spatial Data Service Type ArcGIS Image Service
    Spatial Reference System urn:ogc:def:crs:EPSG::4326
    Spatial Harvester True
    Temporal Extent Begin 1889-01-01
    Temporal Extent End 2008-01-01

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