I guess if you want to keep the behaviour consistent with epsg-wkt
you'll have to do CRS.decode("epsg:4326", true) instead.
Note for the epsg-hsql case you're getting lat/lon axis order, while for
the epsg-wkt case you're getting lon/lat.
Cheers,
Gabriel
On Wed, 2011-06-15 at 10:14 -0500, Brian Clements wrote:
> Hello, I've been using the epsg-wkt component for a few years and have
> a decent amount of code written around it. I'm currently trying to
> switch over to the epsg-hsql component since it has better support for
> polar stereographic projections.
>
>
> While doing this I ran into an issue with epsg:4326. I'll use the
> following code to illustrate:
>
>
>
>
> import org.geotools.referencing.CRS;
> import org.junit.Assert;
> import org.junit.Test;
> import org.opengis.referencing.crs.CoordinateReferenceSystem;
> import org.opengis.referencing.cs.CoordinateSystem;
>
>
>
>
> public class EpsgTest {
>
>
> @Test
> public void CrsTest(){
> try {
> CoordinateReferenceSystem crs = CRS.decode("epsg:4326");
> CoordinateSystem cs = crs.getCoordinateSystem();
> System.out.println(cs);
> } catch (Exception e) {
> e.printStackTrace();
> Assert.fail();
> }
> }
>
>
> }
>
>
> Case 1
> pom.xml dependencies:
> <dependency>
> <groupId>org.geotools</groupId>
> <artifactId>gt-referencing</artifactId>
> <version>2.7.1</version>
> <type>jar</type>
> <scope>compile</scope>
> </dependency>
> <dependency>
> <groupId>org.geotools</groupId>
> <artifactId>gt-epsg-hsql</artifactId>
> <version>2.7.1</version>
> <type>jar</type>
> <scope>compile</scope>
> </dependency>
>
>
> Output:
> EllipsoidalCS["Ellipsoidal 2D CS. Axes: latitude, longitude.
> Orientations: north, east. UoM: degree",
> AXIS["Geodetic latitude", NORTH],
> AXIS["Geodetic longitude", EAST],
> AUTHORITY["EPSG","6422"]]
>
>
> Case 2
> pom.xml dependencies:
> <dependency>
> <groupId>org.geotools</groupId>
> <artifactId>gt-referencing</artifactId>
> <version>2.7.1</version>
> <type>jar</type>
> <scope>compile</scope>
> </dependency>
> <dependency>
> <groupId>org.geotools</groupId>
> <artifactId>gt-epsg-wkt</artifactId>
> <version>2.7.1</version>
> <type>jar</type>
> <scope>compile</scope>
> </dependency>
>
>
> Output:
> EllipsoidalCS["WGS 84",
> AXIS["Geodetic longitude", EAST],
> AXIS["Geodetic latitude", NORTH],
> AUTHORITY["EPSG","4326"]]
>
>
> I get different math transforms when converting epsg:4326 coordinates
> to coordinates in a lambert conformal projected crs in the two cases.
> The math transforms I get in case 1 produce NaN pairs instead of the
> correct coordinates I get using the crs in case 2.
>
>
> Please let me know if this is expected with the epsg-hsql component,
> if I am doing something wrong or if you need more information. Thanks!
>
>
> -Brian
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--
Gabriel Roldan
[email protected]
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