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5.7 nccopy
The nccopy command-line utility copies and optionally compresses and chunks netCDF data.

 

 

The nccopy has options to specify what kind of output to generate and optionally what level of compression to use and how to chunk the output.

nccopy [-k output_kind] [-d level] [-s] [-c chunkspec]
       [-u] [-m n] [-h n] [-e n] input output

  [-k output_kind] kind of output netCDF file
              omitted => same as input
              '1' or 'classic' => classic file format
              '2' or '64-bit-offset' => 64-bit offset format
              '3' or 'netCDF-4' =>  netcdf-4 format
              '4' or 'netCDF-4 classic  model' => netCDF-4 classic model
  [-d level]  deflation level, from 1 (faster but lower compression)
              to 9 (slower but more compression)
  [-s]        shuffling option, sometimes improves compression
  [-c chunkspec] specify chunking for dimensions, e.g. "dim1/N1,dim2/N2,..."
  [-u]        convert unlimited dimensions to fixed size in output
  [-m n]      memory buffer size (default 5 Mbytes)
  [-h n]      set size in bytes of chunk_cache for chunked variables
  [-e n]      set number of elements that chunk_cache can hold
  input       name of input file or OPeNDAP URL
  output      name of output file

 


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