Le lundi 19 février 2007 à 17:39 +0100, Mike Lehmann a écrit :
> The last hours I read a lot of documentation about setting up CRS with
> geotools. Unfortunately, it seems to require a database. We only want to
> transform between two coordinate systems WGS84 (latitude, longitude) and
> Gauss-Krüger (Germany, chooseable center-meridian stripe). Is it really
> necessary to set up a database for this transformation?
You can process with the following steps:
1) Temporarily put "gt2-epsg-hsql.jar" in your classpath:
2) Execute the following command from the command line, where <code>
is the EPSG code for your coordinate reference system:
java org.geotools.referencing.factory.epsg.DefaultFactory <code>
Note: on Geotools 2.4, this command will be replaced by a slightly
more generic one there (not limited to EPSG codes):
java org.geotools.referencing.CRS <code>
3) The above-command should print the Well Known Text (WKT) for your
CRS. Copy and paste the WKT as a String constant in your code.
4) You can remove the "gt2-epsg-hsql.jar" file from your classpath.
5) In your code, use
CoordinateReferenceSystem crs = CRS.parseWKT(theWktString);
Martin
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