CDL Example of Groups

22.2 CDL Example of Groups

This CDL example demonstrates one use of groups.

Organizing data by a named property such as region:

Some things to note in this example:

There are 3 different, independent dimensions named "station", one for each of the subgroups "Colorado", "Wyoming", and "Alaska".
The unlimited dimension "time" in the "USA" group is inherited by each of the subgroups, which use it to define the shape of their different "temperature" variables.

Here is C code that creates the corresponding netCDF file, generated by running:

  ncgen -k 3 -l C regions.cdl > regions.c