[Geotools-gt2-users] Different results in coordinate transformation depending on used jar-Files (geotools v2.4 vs. geotools v2.5)

[Erich S. <Eri...@gm...>]

Hello all,

I'm new to GeoTools, which I want to use for coordinate transformation/conversion. So I tried to write a first "HelloWorld"-kinded Java-Programm as listed below.

To do this, I obviously need - at runtime - the following jars:

geoapi
gt-api
gt-epsg-hsql
gt-epsg-wkt
gt-metadata
gt-referencing
hsqldb
jsr
jts
vecmath

That  is in GT 2.4 I use:

geoapi-nogenerics-2.1.0.jar
gt2-api-2.4.4.jar
gt2-epsg-hsql-2.4.4.jar
gt2-epsg-wkt-2.4.4.jar
gt2-metadata-2.4.4.jar
gt2-referencing-2.4.4.jar
hsqldb-1.8.0.7.jar
jts-1.8.jar
vecmath" value="vecmath-1.3.1.jar
jsr108-0.01.jar

Working with GT 2.4 I get the expected results:

   (5.5, 51.5, NaN)--(2465319.9084173385, 5707389.990091773, NaN)
   Geom-x=2465319.9084173385 Geom-y=5707389.990091773 Geom-z=NaN


But if I use the corresponding jars delivered with GT 2.5 I get obviusly wrong results:

   (5.5, 51.5, NaN)--(8160251.446339277, 866025.4670919782, NaN)
   Geom-x=8160251.446339277 Geom-y=866025.4670919782 Geom-z=NaN

In that case I'm using:

geoapi-2.2-M1.jar
gt-api-2.5-RC0.jar
gt-epsg-hsql-2.5-RC0.jar
gt-epsg-wkt-2.5-RC0.jar
gt-metadata-2.5-RC0.jar
gt-referencing-2.5-RC0.jar
hsqldb-1.8.0.7.jar
jts-1.9.jar
vecmath-1.3.1.jar
jsr-275-1.0-beta-2.jar
Could anybody tell me what I'm doing wrong?

Greetings
Erich


// code:
import org.geotools.geometry.jts.JTS;
import org.geotools.referencing.CRS;
import org.opengis.referencing.FactoryException;
import org.opengis.referencing.NoSuchAuthorityCodeException;
import org.opengis.referencing.crs.CoordinateReferenceSystem;
import org.opengis.referencing.operation.MathTransform;
import org.opengis.referencing.operation.TransformException;

import com.vividsolutions.jts.geom.Coordinate;
import com.vividsolutions.jts.geom.Geometry;
import com.vividsolutions.jts.geom.GeometryFactory;
import com.vividsolutions.jts.geom.Point;
public class myTest {
   public static void main(String [] args) {
		// TODO Auto-generated method stub

		
		CoordinateReferenceSystem srIn  = null;
		CoordinateReferenceSystem srOut = null;
		try {
			srIn  = CRS.decode( "EPSG:4326" );  // WGS84
			System.out.println(srIn.getName());
			srOut = CRS.decode( "EPSG:31462" );  // GK2
			System.out.println(srOut.getName());
			System.out.println(srOut.toWKT());

			MathTransform trans = CRS.findMathTransform(srIn, srOut, true);
			
			Coordinate oCoor = new Coordinate( 5.5, 51.5);
			Coordinate nCoor = null;
			GeometryFactory gf = new GeometryFactory();
			Point oP = gf.createPoint( oCoor );			
			
			try {
				// 1st try
				nCoor = JTS.transform(oCoor, nCoor, trans);
				if (nCoor != null) {
					System.out.println(oCoor.toString() + "--" + nCoor.toString());
				}
				else
					System.out.println("Failure!");

				// 2nd try
				Geometry geom = JTS.transform(oP, trans);
				System.out.println("Geom-x=" + geom.getCoordinate().x + " Geom-y=" + geom.getCoordinate().y + " Geom-z=" + geom.getCoordinate().z);
				
			} catch (TransformException e) {
				e.printStackTrace();
			}
		} catch (NoSuchAuthorityCodeException e) {
			e.printStackTrace();
		} catch (FactoryException e) {
			e.printStackTrace();
		}
}
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