You are viewing an old version of this page. View the current version.

Compare with Current View Page History

« Previous Version 7 Next »

Recommendation:

Only compression filters that are officially supported by a default installation of the current netCDF4 software distribution should be used in Earth Science data products.  Currently, DEFLATE is the only such filter.


Recommendation Details:

NetCDF4 has recently (4.7.0) enabled access to non-default (i.e., non-DEFLATE) HDF5 compression filters.  However the filter identification and access are currently obscure (~five digit IDs) and non-portable (no guarantees client software will be able to decompress them).  DEFLATE is the only compression filter that is guaranteed to work with default (non-customized) netCDF4 installations, and so DEFLATE is the only compression filter that should be used in interoperable Earth Science data products.

This recommendation may evolve as netCDF4 extends its default compression filter support to other filters.

Here is a link regarding netCDF4 general filter support: https://www.unidata.ucar.edu/software/netcdf/docs/md__Volumes_Workspace_Ward_releases_netcdf-c-4_87_82_netcdf-c_docs_filters.html .

  • No labels