On Mon, May 4, 2015 at 6:49 AM, Tom Wardrop <[email protected]> wrote:
> Hi all,
>
> I have my WMS service and raster layers configured use bilinear
> resampling. While these layers look perfect on their own, when added to a
> layer group, GeoServer seems to fall back to nearest neighbour resampling
> making the image quality worse. I’ve noticed this behaviour whenever
> there’s more than one layer in a layer group as a layer group containing
> only a single a single layer appears fine.
>
> I’ve found the issue has already been reported on the mailing list by
> someone else as affecting GeoServer v2.1. I’m using 2.6.2 so obviously the
> issue has yet to be addressed. The existing issue can be found here:
> http://sourceforge.net/p/geoserver/mailman/message/27750315/
>
> Here is a link which includes an example of a layer group with a single
> layer (same as viewing the layer on it’s own) and another showing the layer
> group with multiple layers:
> https://drive.google.com/folderview?id=0B0QYHTaybWU_fjF5SEtCSDZvOU1PRzVCb3J1dFBiWUloYnJCUDRua201ZGZweGtrTnUtb3c&usp=sharing
>
> The issue linked above mentioned that in GeoServer 2.1 the raster
> rendering code paths were split; one is server in image server mode, and
> the other in map server mode, which is likely the cause of this.
>
I see the thread, but could not find a ticket in the bug tracker. There are
too many discussions, we just lose track
of them, could you open a report in the bug tracker instead?
https://osgeo-org.atlassian.net/projects/GEOS
>
> This really needs to be fixed.
>
As an open source project, features and fixes are done either when there is
funding directed to a specific topic (working hours jobs)
or when someone decides they are more important than their spare time
(spare time jobs). Everybody is invited to contribute,
and indeed many do, we have like 60 contributors over a year, against a
core team of 5-10 direct committers.
You seem to be motivated, do you have time and skill?
Instructions for contribute here:
https://github.com/geoserver/geoserver/blob/master/CONTRIBUTING.md
Or if anybody else here wants to help, and has skill related to rendering,
this would be a great occasion to
give back to the project, too.
Cheers
Andrea
--
==
GeoServer Professional Services from the experts! Visit
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==
Ing. Andrea Aime
@geowolf
Technical Lead
GeoSolutions S.A.S.
Via Poggio alle Viti 1187
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