Ciao Gpetr,
please, find my feedback inline below...
Regards,
Simone Giannecchini
Ing. Simone Giannecchini
@simogeo
Founder/Director
GeoSolutions S.A.S.
Via Poggio alle Viti 1187
55054 Massarosa (LU)
Italy
phone: +39 0584 962313
fax: +39 0584 1660272
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http://www.geo-solutions.it
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-------------------------------------------------------
On Wed, Feb 5, 2014 at 3:20 PM, Gpetr <gkpetrak@anonymised.com> wrote:
Hi,
I cropped some Geotiff files on QGIS to have the same coordinates.(the same
Bounding Box each image).
The images have the same SRS. Then I uploaded them on GeoServer.
When I'm trying to multiply or add two images on WPS request Builder, I get
the following error:
"Process failed during execution
coverageA and coverageB should share the same Envelope"
I check the bounding box of the images via GeoServer's interface and I see
that the bounding box of the images is different !
Use the gdalinfo and check the bbox and the grid to worl dtransformation.
GeoServer does no rounding on each of them hence if it says that they
are different they usually are 
I changed their bounding box to be the same (from the GeoServer's layers
This has no impact on the wps process as it uses the low level data.
That settings is useful for WMS only.
info interface) and when I run the ras:MultiplyCoverages process, I get the
same error.
Checking the code here:
https://github.com/geotools/geotools/blob/master/modules/unsupported/process-raster/src/main/java/org/geotools/process/raster/MultiplyCoveragesProcess.java
there is a check that you can find in this method:
https://github.com/geotools/geotools/blob/master/modules/unsupported/process-raster/src/main/java/org/geotools/process/raster/BaseCoverageAlgebraProcess.java
that checks (between other things) if the two envelopes are coincident.
Now, one thing you could do would be to make use of the
GridCoverage2DRIA class to adapt one coverage to the other:
https://github.com/geoserver/geoserver/blob/master/src/extension/wps/wps-core/src/main/java/org/geoserver/wps/gs/GridCoverage2DRIA.java
see example usage here:
https://github.com/geoserver/geoserver/blob/master/src/extension/wps/wps-core/src/test/java/org/geoserver/wps/gs/Coverage2RenderedImageAdapterTest.java
Using this approach (I would probably make it non-default via a config
param) you could actually make the multiply coverages process more
resilient.
It looks hard to do, but it is not if you have some coding skills in
Java. If you take this endeavour, we should able to help you out with
some info/reviews.
Why is it happens ?
How can I fix it ?
Thank you in advance,
George
--
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Sent from the GeoServer - User mailing list archive at Nabble.com.
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