On Wed, Jun 20, 2012 at 4:45 PM, Felix Mayer <[email protected]> wrote:

> I have 2 ImageMosaic layers in GeoServer 2.1.1 with a few 8-bit large
> GeoTIFF images in each; one layer has 1m resolution, the other 10cm
> resolution, both have embedded pyramid/overview images. When I look at the
> layers by themselves (e.g. with the preview), they have good color and
> contrast. However, when I add both layers to a layer group and look at
> that, the resulting image loses almost all color and contrast; it becomes
> mostly grey with just a little color left. I tried debugging, but could not
> find the code where the actual painting happens. What could cause this loss
> of color and contrast? Is there any way to control the rendering in a layer
> group?
>

The paintng code for a case with two or more raster layers is back in
Geotools.
Do you have a sampler of the data? If so please open a report on
jira.codehaus.org and attach a sample
of the two mosaics that results in color degradation when a WMS request is
made

Cheers
Andrea


-- 
Ing. Andrea Aime
GeoSolutions S.A.S.
Tech lead

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