Coastal Digital Elevation Models (DEMs)
Digital elevation models (DEMs) of U.S. and other coasts that typically integrate ocean bathymetry and land topography. The DEMs support NOAA's mission to understand and predict changes in Earth's environment, and conserve and manage coastal and marine resources to meet our Nation's economic, social, and environmental needs. NOAA's National Centers for Environmental Information (NCEI) has built many of these models, and also distributes DEMs on behalf of other NOAA offices, as well national and international partners. Bathymetric, topographic, and shoreline data used in DEM development come from a variety of sources, including NOAA's National Ocean Service (NOS) and NCEI, the U.S. Geological Survey (USGS), the U.S. Army Corps of Engineers (USACE), and the Federal Emergency Management Agency (FEMA), as well as other federal, state, and local government agencies, academic institutions, and private companies. The DEMs are referenced to a variety of vertical tidal datums, typically mean high water (MHW) or North American Vertical Datum of 1988 (NAVD 88), and usually a horizontal datum of North American Datum of 1983 (NAD 83) or World Geodetic System 1984 (WGS84). DEM cell sizes range from high-resolution models (1/9 to 1/3 arc-second; ~3 to 10 meters) that support coastal inundation studies, to regional models (roughly 3 to 24 arc-seconds) that extend farther offshore, to global models (1 arc-minute; ~2 km).
- Cite as: NOAA National Geophysical Data Center. 2006: Coastal Digital Elevation Models (DEMs). NOAA National Centers for Environmental Information. Accessed [date].
- NCEI Metadata ID: gov.noaa.ngdc:ngdc_dems
gov.noaa.ngdc:ngdc_dems
Distribution Formats |
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Ordering Instructions | Contact NCEI for other distribution options and instructions. |
Distributor | NOAA National Centers for Environmental Information
ncei.info@noaa.gov |
Dataset Point of Contact | NOAA National Centers for Environmental Information
ncei.info@noaa.gov |
Dataset Point of Contact | DEM Information
NOAA National Centers for Environmental Information dem.info@noaa.gov |
Time Period | 2006-01-01 to Present |
Spatial Bounding Box Coordinates |
N: 90.0
S: -90.0
E: 180.0
W: -180.0
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Spatial Coverage Map |
General Documentation |
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Publication Dates |
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Dataset Progress Status | Ongoing - data is continually being updated
Historical archive - data has been stored in an offline storage facility |
Data Update Frequency | As needed - New models are added to this collection as they become available. |
Purpose | The DEMs can be used for modeling of coastal processes (tsunami inundation, storm surge, sea-level rise, contaminant dispersal, etc.), ecosystems management and habitat research, coastal and marine spatial planning, and hazard mitigation and community preparedness. |
Use Limitations |
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Dataset Citation |
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Cited Authors |
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Publishers |
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Theme keywords | Global Change Master Directory (GCMD) Science Keywords
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Data Center keywords | Global Change Master Directory (GCMD) Data Center Keywords
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Platform keywords | Global Change Master Directory (GCMD) Platform Keywords
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Place keywords | Global Change Master Directory (GCMD) Location Keywords
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Project keywords | Global Change Master Directory (GCMD) Project Keywords
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Use Constraints |
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Access Constraints |
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Other Constraints | Cite as: NOAA National Geophysical Data Center. 2006: Coastal Digital Elevation Models (DEMs). NOAA National Centers for Environmental Information. Accessed [date]. |
Fees |
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Processing Steps |
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Last Modified: 2023-03-31
For questions about the information on this page, please email: ncei.info@noaa.gov