[Proj4j] Conversion issue

[Martin Davis]

I just committed a patch to the Registry which should avoid potential 
race conditions during initialization.

Also, the idea about conflicting JARs is a good thing to look at too.  
Ah, the joys of Java classloaders...

On 10/19/2012 8:36 AM, Martin Davis wrote:
> 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
>>> _______________________________________________
>>> Proj4j mailing list
>>> Proj4j at lists.osgeo.org
>>> http://lists.osgeo.org/mailman/listinfo/proj4j
>>>
>>>
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