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Data Description:
Data representing land elevation and ocean bathymetry. This layer was created from data provided by the British Oceanographic Data Centre (BODC) General Bathymetric Chart of the Oceans (GEBCO) 30-arc-second GEBCO_08 data set. This layer is continually updated by BODC.

Source (Internet URL, CD/DVD-ROM):

The GEBCO Digital Atlas is published and maintained by the British Oceanographic Data Centre (BODC) of the Natural Environmental Research Council (NERC) on behalf of the International Hydrographic Organization (IHO) and the Intergovernmental Oceanographic Commission (IOC) of UNESCO, acting through the Joint IOC/IHO Guiding Committee for GEBCO. The contents of this data layer were published in November 2009, version 20091120.

Data Summary:
Digital data in ESRI ASCII Grid format was exported into ERDAS Imagine .img raster format using ArcGIS 9.3.1. Data are presented in geographic coordinates on the North American Datum of 1983.

Disclaimer or Constraints on Use:
Data from the GEBCO’s gridded data sets are not to be used for navigation or for any other purpose relating to safety at sea. The IHO, IOC, NERC, and BODC are not able to warrant the accuracy of the data and accept no responsibility whatsoever for determining the fitness of the data for their intended use or for any consequential loss, damage, or expense arising from such use. Users should be aware that most areas of the world’s oceans have not been fully surveyed and that the GEBCO bathymetry is an interpretation based on random tracklines of data from many sources. The quality and coverage of data from these sources are highly variable.

Information on accessing the latest versions of the GEBCO data sets can be found on the GEBCO website:

Figure A-1
GEBCO elevation data for the CEUS study area (BODC, 2009)


CEUS-SSC Project Website