We have recently updated our GEBCO grid download application. It still gives access to GEBCO's grids and allows download of the data in a number of formats but it now also gives access to grids at multiple resolutions.
Multi-resolution grids
The global GEBCO grid is currently made available as a global 15 arc-second interval grid. However, in some regions, it is based on data at higher resolutions. To accommodate users who want access to higher resolution gridded bathymetry data, where it exists, a test multi-resolution grid product has been developed. This is now available through the new download application.
Currently, data at multiple resolutions is only available for certain test areas, i.e. off Australia, waters around New Zealand and the Hawaiian Islands.
Please provide any feedback on the new application: gdacc@seabed2030.org