Data:Coastal DEMs


Coastal DEMs dataset information page

Short Description

Integrated coastal DEM.jpg
Color hillshade of Monterey, CA coastal DEM

Statement: High-resolution, integrated bathymetric-topographic relief models of U.S. coastal communities; 1/3 arc-second (~10 m) cell size and coarser

Abstract: NOAA's National Geophysical Data Center (NGDC) builds and distributes high-resolution, coastal digital elevation models (DEMs) that integrate ocean bathymetry and land topography to 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. They 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.

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 vertical tidal datum of North American Vertical Datum of 1988 (NAVD 88) or Mean High Water (MHW) and horizontal datum of World Geodetic System of 1984 (WGS 84). Cell size ranges from 1/3 arc-second (~10 meters) to 36 arc-seconds (~1 km).

Data format

Data type: Topography
Data origin: Modeled
Data format: NetCDF
Other format: Arc ASCII
Data resolution: 1/3 arc-second (~10 meter) cell size and coarser
Datum: WGS 84 geographic (horizontal); NAVD 88 or MHW (vertical)

Data Coverage

Spatial data coverage: U.S. coastal communities
Temporal data coverage: Time averaged
Time period covered: roughly 1950s to present


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