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Gebco bathymetry one minute arc grid
Gebco a global one arc-minute grid. Released: 2003, updated: 2008 On behalf of GEBCO, the GEBCO one arc-minute grid is available to download from the British Oceanographic... - 
    
      
Gebco bathymetry 30 arc second grid
Gebco global 30 arc-second grid updated in 2008. On behalf of GEBCO, the GEBCO_08 and GEBCO is available to download from the British Oceanographic Data Centre (BODC). 
