Soo... I've found quite a few issues, and I think I fixed them all,
but only on trunk, on 1.5.x I could to make 3031 work (if you have
any magic recipe of your own, please share, it's probably just an
issue of setting up the proper wkt definition :)).
I used the WKT as defined by SCAR at
http://www.antsdi.scar.org/standardsspecifications/refsystemandprojectio
ns/projections/antarctic_wkt.txt/view (my epsg.properties is attached).
One thing, the srsName you provided in the SLD is invalid, the correct
form is
Thanks for pointing that out 
If you try out tomorrow's trunk nightly build you should get the
same image as the one attached with the following request
I will certainly give that a go. Thanks Andrea, I appreciate your
persistence.
Regards,
Miles
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epsg.properties (630 Bytes)