Digital elevation model International Bathymetric Chart of the Southern Ocean. Data type reclassified by the Quantarctica project from the Source identification grid of the International Bathymetric Chart of the Southern Ocean DEM. Downloaded June 2014 from http://doi.pangaea.de/10.1594/PANGAEA.805734?format=html Downloaded file: IBCSO_v1_is_PS71_500m_tif.zip For information on user restrictions, please visit http://doi.pangaea.de/10.1594/PANGAEA.805734?format=html. This page is also available offline in this folder, but note that terms might have changed since data download. References: Arndt, J. E., et al. (2013), The International Bathymetric Chart of the Southern Ocean (IBCSO) Version 1.0—A new bathymetric compilation covering circum-Antarctic waters, Geophys. Res. Lett., 40, 3111–3117, doi:10.1002/grl.50413.