GEBCO_2019/2020/2021 Grids  
  • Current release is 2021.  Geotiff is 4 GB, uncompresses to 8 GB.  Will require subset with GDAL before use

  • Format: Geottff (best bet), netCDF, or ESRI ASCII
  • Entire data set is huge, but you can get just the region you want.
  • Try Global Multi-Resolution Topography Data Portal first

GEBCO Compilation Group (2021) GEBCO 2021 Grid (doi:10.5285/c6612cbe-50b3-0cff-e053-6c86abc09f8f)

Last revision 2/4/2022