Yes, the reprojection is causing a problem since the pixels don't match up
1:1 with the source pixels. It looks like your images have been generated
from a vector data source; if you are able to regenerate them in the desired
output projection you should have better image quality.
--
David Winslow
OpenGeo - http://opengeo.org/
On Mon, Sep 19, 2011 at 4:11 PM, patrick.schevenels <
[email protected]> wrote:
> Hello.
>
> I have a GeoServer 2.1.0 installed on a server.
>
> I have setup some Image Mosaic layers on this GeoServer based on some
> groups
> of GeoTiff files in their original projection (for example EPSG:29902 for
> Ireland or EPSG:28992 for the Netherlands).
>
> These layers have a good image display quality when I visualize them in WMS
> with the integrated OpenLayers component in their original projection.
>
> http://osgeo-org.1803224.n2.nabble.com/file/n6809910/wms.jpg
>
> I have then seeded this layer with GeoWebCache in EPSG:900913 projection
> (in
> order to integrate these layers in Google Maps API). When I visualize the
> result of this seeded layer in GeoWebCache integrated OpenLayers, the
> images
> have a worse display quality.
>
> http://osgeo-org.1803224.n2.nabble.com/file/n6809910/gwc.jpg
>
> Does this quality degradation come from the tiled cache creation or from
> the
> reprojection ?
> Is there a parameter to change to get a better image quality in the
> reprojected cache ?
>
> I have tried to change the WMS compression parameters in GeoServer to 0 (no
> compression), it doesn't seem to change anything.
>
> I have also tried to query the cache in different image formats (JPEG, GIF,
> PNG, ...), the problem seems to appear in every image format.
>
> Thank you for your help.
>
> Best regards.
>
> Patrick.
>
> --
> View this message in context:
> http://osgeo-org.1803224.n2.nabble.com/ImageMosaic-layer-reprojected-with-GeoWebCache-Bad-image-quality-tp6809910p6809910.html
> Sent from the GeoServer - User mailing list archive at Nabble.com.
>
>
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