[Proj4j] Conversion issue

[Gertjan Idema]

Hello Peter,

I just entered your code and it runs fine in my environment.
Are you sure you're always using the same proj4j version?
Are you sure you have no typing errors in +towgs (no capitals for
example)?

Gertjan Idema


On Wed, 2012-10-17 at 12:10 +0200, P. Peterse (HDB) wrote:

> Hello list,
> 
> We are using org.osgeo.proj4j in our project and facing sometimes an
> issue while transforming an coordinate from lat/long format to EPSG:28992.
> Most times the conversion will work ok, but sometimes there comes an
> exception:
> towgs84 parameter is not supported
> The input coordinate is:
> LatLon[lat=52.11882666666666, lon=5.04316]
> 
> The used code is as follows:
> ===============
>         CRSFactory csFactory = new CRSFactory();
>         final String EPSG28992_PARAM = "+proj=sterea
> +lat_0=52.15616055555555 +lon_0=5.38763888888889 +k=0.9999079
> +x_0=155000 +y_0=463000 +ellps=bessel
> +towgs84=565.417,50.3319,465.552,-0.398957,0.343988,-1.8774,4.0725
> +units=m +no_defs";
>         CoordinateReferenceSystem epsg28992 =
> csFactory.createFromParameters("EPSG:28992", EPSG28992_PARAM);
>        
>         final String WGS84_PARAM = "+title=long/lat:WGS84 +proj=longlat
> +ellps=WGS84 +datum=WGS84 +units=degrees";
>         CoordinateReferenceSystem epsg4326 =
> csFactory.createFromParameters("WGS84",WGS84_PARAM);
>        
>         CoordinateTransformFactory ctFactory = new
> CoordinateTransformFactory();
>         CoordinateTransform trans = ctFactory.createTransform(epsg4326,
> epsg28992);
>         ProjCoordinate inCoord = new ProjCoordinate();
>         ProjCoordinate outCoord = new ProjCoordinate();
>         inCoord.y = pos.getLat();
>         inCoord.x = pos.getLon();
>         //convert from lat/lon to RD.
>         trans.transform(inCoord, outCoord);
>         final double[] point = new double[2];
>         point[0]=outCoord.x;
>         point[1]=outCoord.y;
>        
>         return point;
> ===============
> 
> Does anyone have a clue what's going wrong over here?
> 
> Thanks for your patience.
> 
> Regards,
> Peter Peterse
> _______________________________________________
> Proj4j mailing list
> Proj4j at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/proj4j


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/proj4j/attachments/20121017/46b9342f/attachment.html>