mcr ha scritto:
> The following EPSG  coordsystems 
> 
> 31251 - 31259 and  31281-31290 do not include   the official values for
> accurate transformations
> 
> 
> TOWGS84[577.326,90.129,463.919,5.137,1.474,5.297,2.4232]
> 
> (resulting in a geotools error "Missing bursa woulf parameters")
> 
> Each time installing a new version of geotools forces me to switch to the
> wkt plugin and
> correcting the CRS definition.
> 
> Is there another possibilty  for correcting this in an automatic way.

Hum, the first thing to do to avoid this would be to contact the EPSG
and ask the correct TOWGS84 params to be included in the official 
database (I'm not sure we're using the latest version of the official
dataset either, so maybe it has been corrected in the meantime).

The second one would be to use epsg-extension to roll your own personal
authority overriding the default EPSG one. In GeoServer we do use
epsg-extension to allow people adding crs codes that are missing
from the EPSG database, but from the next version of GS we'll be 
changing it to allow people to override the official database instead.

Afaik this only requires setting a different priority in the
authority, but I still haven't tried out.

More information about this follow.
The source code for the GeoServer extension:
http://svn.codehaus.org/geoserver/trunk/geoserver/main/src/main/java/org/vfny/geoserver/crs/
The geoserver jira issue with some comments from the gt2 referencing 
module mantainer:
http://jira.codehaus.org/browse/GEOS-1783

Hope this helps
Cheers
Andrea

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