On Fri, Aug 24, 2012 at 11:12 AM, "Peter Löwe" <peter.loewe at gmx.de> wrote: ... > The GEBCO data is probably what you are looking for. Google uses it as well: > http://www.gebco.net/data_and_products/gridded_bathymetry_data/ Related hints are in the Wiki: http://grass.osgeo.org/wiki/Global_datasets#GEBCO_Bathymetric_Chart Markus