[Proj4j] Conversion issue

[Martin Davis]

Not sure why this would be a transient error.  Are you using the code
in a multithreaded context?  It's possible there's a race condition in
the Registry initialization.  If you can recompile the code, try
changing the initialize method in Registry.java to:

  private synchronized void initialize() {

M

On Fri, Oct 19, 2012 at 6:14 AM, P. Peterse (HDB)
<p.peterse at han-dataport.nl> wrote:
> Hello,
>
> here is the stack trace from my code:
> ===============
> org.osgeo.proj4j.InvalidValueException: Unknown projection: sterea
>     at
> org.osgeo.proj4j.parser.Proj4Parser.parseProjection(Proj4Parser.java:71)
>     at org.osgeo.proj4j.parser.Proj4Parser.parse(Proj4Parser.java:43)
>     at org.osgeo.proj4j.CRSFactory.createFromParameters(CRSFactory.java:120)
>     at org.osgeo.proj4j.CRSFactory.createFromParameters(CRSFactory.java:98)
>     at com.hdb.tol.wms.RDConverter.convert2WGS84(RDConverter.java:114)
> ===============
>
> What can I check?
>
> Thanks for any reply.
> Peter
>
> Op 19-10-2012 10:40, P. Peterse (HDB) schreef:
>> Hello Martin,
>>
>> It looks indeed that it's an initialisation issue. We are trying to
>> trace the bug and for now we suspect that the issue is in the class
>> Proj4Keyword
>> This method checkUnsupported is throwing the error. The code thinks one
>> of the params is not supported.
>>
>> If we find a sollution we will send it.
>>
>> Regards,
>> Peter Peterse
>>
>>
>> Op 17-10-2012 18:27, Martin Davis schreef:
>>> I just tried this as well, and the code works fine for me.  But if the
>>> problem is some kind of transient intialization error it's probably
>>> not going to show up in simple one-off tests.
>>>
>>> All I can suggest is to try and see if you can catch the problem in a
>>> debug session, and then have a look at why it might be occurring.
>>>
>>> Nice to see Proj4J is getting used!
>>>
>>> Martin
>>>
>>> On Wed, Oct 17, 2012 at 3:10 AM, P. Peterse (HDB)
>>> <p.peterse at han-dataport.nl> 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
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>>
>
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