Re: [Geotools-gt2-users] parameters transform

[Martin D. <mar...@ge...>]

sezar a =C3=A9crit :
> the jars with epsg are:
> gt2-epsg-access-2.2-RC3.jar
> gt2-epsg-hsql-2.2-RC3.jar
> gt2-epsg-postgresql-2.2-RC3.jar
> gt2-epsg-wkt-2.2-RC3.jar

Could you try to put in the classpath only one of those? Try:

     gt2-epsg-hsql-2.2-RC3.jar

and try again in an other test:

     gt2-epsg-wkt-2.2-RC3.jar

and tell me if one is better than the other.

What I'm suspecting: I noticed that the first CRS uses:

     DATUM["European Datum 1950(1977)", ...
       TOWGS84[-123.02, -158.95, -168.47, 0.0, 0.0, 0.0, 0.0]

while the second CRS uses:

     DATUM["European Datum 1950", ..
       TOWGS84[-157.89, -17.16, -78.41, 2.118, 2.697, -1.434, -1.10970465=
76093785]

Both datum are considered differents, because the names are not exactly t=
he same. They also have=20
different TOWGS84 parameters. However I wonder if they were not supposed =
to be considered the same.=20
Because gt2-epsg-wkt do not supports datum shift through Bursa-Wolf param=
eters, if gt2-epsg-wkt=20
gives closer results, then this means that the above-cited datum should b=
e considered as the same one.

	Martin.