I just noticed the following page:

http://docs.codehaus.org/display/GEOSDOC/Custom+projection+definition+in+Geoserver+1.5.0+%28onwards%29

Since Geoserver 1.5 searchs for "epsg.properties" file into the 
"$datadir/user_projections" directory, should we define a system property to be 
used by FactoryUsingWKT in order to search in a particular directory? The 
"org/geotools/referencing/factory/epsg" directory would be the default if no 
system property was found. It would avoid the need to create a subclass in 
Geoserver, and provide a common hook for Geoserver and uDig.

As a side note, would "$datadir/user_crs" be a better directory name than 
"$datadir/user_projections"? ProjectedCRS is just a particular kind of CRS, and 
"projection" has yet an other meaning in ISO 19111.

        Martin

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