Just found [GEOT-5428] Support NetCDF rotated pole projection... I think 
this answers my question.  Thanks


On 19/06/2016 10:11 p.m., Iain Matcham wrote:
> Hi all
>
> We've got a bunch of netcdf files that we are trying to read with
> geotools following the instructions here:
> http://docs.geotools.org/latest/userguide/library/coverage/multidim.html
>
> Most of the files cause an exception in the NetCDFReader constructor
> (java.lang.IllegalStateException: Unable to create envelope for this
> dataset).  We have tracked this down to the netCDF files using a rotated
> grid instead of a cartesian grid. The upshot of this is that the files
> define lat/lon as a secondary lookup (2-d) instead of as a linear (1-d)
> variable.  However NetCDFGeoreferenceManager reports these as
> "unsupported axes", with the result being that NetCDFReader finds no
> lat/lon axis and throws the above exception.
>
> I'm assuming that this is by design but wondered if am I missing
> something obvious?
>
> Assuming that I am not, the methodology of creating a rotated grid
> appears to conform to the CF-convention specs and we have examples of
> these files from at least two different software origins - all of which
> implies that they are being created correctly to spec.  Bearing this in
> mind is there any interest if we were to extend gt-netcdf to handle
> these files?  And/or is there a good reason why we shouldn't try to do
> this that anyone knows of?
>
> Thanks :)
>
> Iain
>
>
>
>
>

-- 
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