Colour-encoded image of bathymetry built from published New Zealand bathymetric contours (Chart Around New Zealand (CANZ) Group (2008), 'New Zealand Region Bathymetry', 1:4,000,000 scale at 46°S on Mercator projection, NIWA Chart, Miscellaneous Series No. 85, National Institute of Water and Atmospheric Research, Wellington, New Zealand) edged-matched with bathymertic contours from GEBCO 2003 (IOC, IHO and BODC, 2003. Centenary Edition of the GEBCO Digital Atlas, published on CD-ROM on behalf of the Intergovernmental Oceanographic Commission and the International Hydrographic Organization as part of the General Bathymetric Chart of the Oceans, British Oceanographic Data Centre, Liverpool, U.K.).