Data:NGDC Coastal Relief Model

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NGDC Coastal Relief Model dataset information page

Short Description

NGDC Coastal Relief Model.png
Coverage of the U.S. CRM

Statement: Integrated bathymetric-topographic relief models of U.S. coasts; 3 arc-second (~90 m) cell size

Abstract: The 3 arc-second U.S. Coastal Relief Model (CRM) provides the first comprehensive view of the U.S. coastal zone, integrating offshore bathymetry with land topography into a seamless representation of the coast. The CRM spans the U.S. East and West Coasts, the northern coast of the Gulf of Mexico, Puerto Rico, and Hawaii, reaching out to, and in places even beyond, the continental slope.

Bathymetric data sources include the U.S. National Ocean Service Hydrographic Database, the U.S. Geological Survey (USGS), the Monterey Bay Aquarium Research Institute, the U.S. Army Corps of Engineers, and various other academic institutions. Topographic data are from the USGS and the Shuttle Radar Topography Mission (SRTM). Volumes 3 through 5 also use bathymetric contours from the International Bathymetric Chart of the Caribbean Sea and the Gulf of Mexico project.

Data format

Data type: Topography
Data origin: Modeled
Data format: NetCDF, Binary, ASCII
Other format: Arc ASCII
Data resolution: 3 arc-second (~90 m) cell size (horizontal); 0.1 m (vertical)
Datum: NAD 83 geographic (horizontal); sea level (vertical)

Data Coverage

Spatial data coverage: conterminous U.S. coasts, Hawaii and Puerto Rico
Temporal data coverage: Time averaged
Time period covered:


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