[Geotools-gt2-users] GeodeticCalculator questions (long)

[Raif S. N. <ra...@fo...>]

hello all,

i'm trying to run the following test case with the trunk codebase, maven
2.0.5 and java 1.5.0_11:

public class TestGeodeticCalculator extends TestCase
{
   public void testGeodeticCalculator() throws Exception
   {
      final CoordinateReferenceSystem crs =3D CRS.decode("EPSG:4326");
      final GeodeticCalculator gc =3D new GeodeticCalculator(crs);
      gc.setStartingGeographicPoint(-180.0, 0.0);
      gc.setDestinationGeographicPoint(+180.0, 0.0);
      final double d1 =3D gc.getOrthodromicDistance();
      System.out.println("*** Earth circumference (1) =3D " + d1);
      gc.setDestinationGeographicPoint(0.0, 0.0);
      final double d21 =3D gc.getOrthodromicDistance(); // this is line #23
      gc.setDestinationGeographicPoint(+180.0, 0.0);
      final double d22 =3D gc.getOrthodromicDistance();
      System.out.println("*** Earth circumference (2) =3D " + (d21 + d22));
   }
}


the output, when running maven with the above single test, looks like
so:

=2D------------------------------------------------------
 T E S T S
=2D------------------------------------------------------
Running ...TestGeodeticCalculator
*** Earth circumference (1) =3D 0.0
Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 1.194 sec <=
<< FAILURE!

Results :

Tests in error:=20
  testGeodeticCalculator(...TestGeodeticCalculator)

Tests run: 1, Failures: 0, Errors: 1, Skipped: 0


the surefire-report for the same test shows:

=2D------------------------------------------------------------------------=
=2D-----
Test set: au.com.forge.mapIntelligence.ogc.TestGeodeticCalculator
=2D------------------------------------------------------------------------=
=2D-----
Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 1.194 sec <=
<< FAILURE!
testGeodeticCalculator(...TestGeodeticCalculator)  Time elapsed: 1.161 sec =
 <<< ERROR!
java.lang.AssertionError: Coordinate Reference System:  WGS 84             =
=20
Ellipsoid:                    WGS 84             =20
Source point:                 180=EF=BF=BD00.0'W 00=EF=BF=BD00.0'N
Target point:                 00=EF=BF=BD00.0'E 00=EF=BF=BD00.0'N=20
Azimuth:                      00=EF=BF=BD00.0'           =20
Orthodromic distance:         20004016.5 m       =20
	at org.geotools.referencing.GeodeticCalculator.getOrthodromicDistance(Geod=
eticCalculator.java:785)
	at ...TestGeodeticCalculator.testGeodeticCalculator(TestGeodeticCalculator=
=2Ejava:23)


1/ i wasn't expecting '0' as the result but rather something close to
40,000K.  what am i doing wrong?

2/ why is there an assertion failure on computing the distance between
those two points?


TIA + cheers;
rsn