[Proj4j] Conversion issue
P. Peterse (HDB)
p.peterse at han-dataport.nl
Mon Oct 22 02:55:05 PDT 2012
Hello Martin,
I updated the proj4j package and using this library in our project.
unfortunately the error still exists:
============
towgs84 parameter is not supported
org.osgeo.proj4j.UnsupportedParameterException: towgs84 parameter is not
supported
at
org.osgeo.proj4j.parser.Proj4Keyword.checkUnsupported(Proj4Keyword.java:108)
at
org.osgeo.proj4j.parser.Proj4Keyword.checkUnsupported(Proj4Keyword.java:115)
at org.osgeo.proj4j.parser.Proj4Parser.parse(Proj4Parser.java:34)
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)
============
Is this an other issue with an other race condition?
One of your questions was:
Are you using the codein a multithreaded context?
This is true, our project is using multiple threads.
Regards,
Peter
Op 22-10-2012 9:47, P. Peterse (HDB) schreef:
> Hello Martin,
>
> I've just update the proj4j code. And start trying it in our code.
> I will let you now if it will work.
>
> Thanks for digging in to the code.
>
> Regards,
> Peter
>
> Op 19-10-2012 19:52, Martin Davis schreef:
>> 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
>>>>>>> _______________________________________________
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>>>>>
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