Hi Geotools devs,
a recent Geoserver upgrade also upgraded Geotools from 15.1 to 16.2. This
triggered a failure in an image comparison regression test. I've included a
sample image. The image with the 'actual' suffix is generated by Geotools 16.2.
The 'diff' image shows a binary view of pixels that differ. It's quite hard to
see, but when you switch between both images, you see that pixels are shifting
very slightly.
All images are rendered by Geoserver, and are based on an ImageMosaic. Some
mosaics consist of geotiff, others of NetCDF4. Native projection is EPSG:4326
in all cases, the issue only occurs when warping to EPSG:900913.
I've gone through the release notes, which do indicate that work has been done,
for instance on mosaics, but couldn't find a clear cause.
So my question is simply whether this is known, and a regression, or an
intended change.
Image link:
https://drive.google.com/open?id=0BzNMCUANfFR0Zy0wRktjLXh1OEk
thanks,
Jeroen
Jeroen Dries
TAP - Centre for Remote Sensing and Earth Observation Processes
VITO NV | Boeretang 200 | 2400 Mol
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