Nelson Branco created GEOS-4955:
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Summary: Mismatch between WMS GetMap image and GetFeatureInfo
output
Key: GEOS-4955
URL: https://jira.codehaus.org/browse/GEOS-4955
Project: GeoServer
Issue Type: Bug
Components: WMS
Affects Versions: 2.0.2
Environment: Windows Server 2008 R2, Java 1.6.0 Update 23 64Bit
Reporter: Nelson Branco
Assignee: Andrea Aime
I have a raster layer from a WorldImage.
The image is a PNG in indexed mode that has 2 colors (black and green) plus
transparency. In normal cases the GetFeatureInfo is PALETE_INDEX "0.0" when
tranparency, "1.0" when black and "2.0" when green.
The bug appears, at least, when I use the conditions exemplified on below URLs,
the first one is the GetMap request and the second one is the corresponding
GetFeatureInfo for the central point of the GetMap image.
http://map1.mapas.sapo.pt/server/wms?service=WMS&version=1.1.1&request=GetMap&layers=tdt_coverage&styles=&bbox=-896557.948837209,4897567.7,-896557.350387597,4897568.3&width=622&height=330&srs=EPSG:900913&format=image/png&&X=322&Y=160&INFO_FORMAT=text/html&QUERY_LAYERS=tdt_coverage
http://map1.mapas.sapo.pt/server/wms?service=WMS&version=1.1.1&request=GetFeatureInfo&layers=tdt_coverage&styles=&bbox=-896557.948837209,4897567.7,-896557.350387597,4897568.3&width=622&height=330&srs=EPSG:900913&format=image/png&&X=322&Y=160&INFO_FORMAT=text/html&QUERY_LAYERS=tdt_coverage
Has you can test it, the result of GetFeatureInfo is "0.0" when all the image
is green.
Exploring the layer with the OpenLayers in that region I notice that the
results seems to be correct when deeply inside on zone, that is, when largely
surounded of green it return "2.0" and when largely surounded of tranparancy it
return "2.0".
The layer mentioned is a layer group in projection EPSG:900913 and the target
layer is in projection EPSG:102164.
However, when I use the native projection of target layer the result is
correct, has you can see in these URLs
http://map1.mapas.sapo.pt/server/wms?service=WMS&version=1.1.1&request=GetMap&layers=tdt_coverage&styles=&bbox=206799.81,360953.70,206800.27,360954.16&width=622&height=330&srs=EPSG:102164&format=image/png&&X=322&Y=160&INFO_FORMAT=text/html&QUERY_LAYERS=tdt_coverage
http://map1.mapas.sapo.pt/server/wms?service=WMS&version=1.1.1&request=GetFeatureInfo&layers=tdt_coverage&styles=&bbox=206799.81,360953.70,206800.27,360954.16&width=622&height=330&srs=EPSG:102164&format=image/png&&X=322&Y=160&INFO_FORMAT=text/html&QUERY_LAYERS=tdt_coverage
Is there a problem in coordinates transformation for GetFeatureInfo?
Another thing, these eratic results are not exactly the same as in 32 bit JVM,
weird no?
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