Examples of nccopy use

5.8 Examples of nccopy use

Examples of common uses of nccopy

Make a copy of mslp.nc, a netCDF file of any type, to mslp-copy.nc, a netCDF file of the same type. This checks that all the metadata and data are consistent, and that the data can all be accessed using the netCDF API.
```
    nccopy mslp.nc mslp-copy.nc
  
```
Check compressibility of a test file, test.nc, by using nccopy to copy it to a file in which all variables are compressed at level 1. Then check if adding the shuffling option improves compression.
```
    nccopy -d1 test.nc testd1.nc        # compress data in test.nc
    nccopy -d1 -s test.nc testd1s.nc    # shuffle and compress data in test.nc
    ls -l test.nc testd1.nc testd1s.nc  # check results
  
```
output from commands above
Convert a netCDF-4 classic model file to a netCDF-3 classic file, uncompressing any compressed variables.
```
 nccopy -k1 testd1s.nc test_classic.nc
```
Download just the variable named "Total_precipitation" and relevant metadata from an OPeNDAP server dataset into a netCDF file named precip.nc.
```
 nccopy
  'http://motherlode.ucar.edu/thredds/dodsC/fmrc/NCEP/GFS/Hawaii_160km\
  /NCEP-GFS-Hawaii_160km_best.ncd?Total_precipitation' precip.nc 
```
Note: the server created a CF-compliant netCDF file "on-the-fly" from a much larger GRIB dataset.