[Geoserver-users] Problems with transparent raster layers

spillocaster · June 12, 2008, 9:53pm

Hi,

I have a prerendered hybrid map. I use the image pyramid plugin (Geoserver
1.6.4b).

The transparent areas are set to '#00ff00' and this value is defined in the
input transparent field. I use the standard raster-SLD. When I now view the
map it is rendered transparent correctly, but the black text is also
transparent! What can I do? I tested nearly everything.

The raster data are 8 bit TIFFs with nearly the same color table (about 34
entrys), but always in a different order.

Who can help me?
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Simone3 · June 19, 2008, 9:50pm

Ciao,
please read below....

On Thu, Jun 12, 2008 at 11:53 PM, spillocaster
<juergen.spille@anonymised.com> wrote:

Hi,

I have a prerendered hybrid map. I use the image pyramid plugin (Geoserver
1.6.4b).

The transparent areas are set to '#00ff00' and this value is defined in the
input transparent field.

This means that you want to transform the red pixel into transparent
ones for the input images.
Is this the behavior you are expecting?

I use the standard raster-SLD. When I now view the
map it is rendered transparent correctly, but the black text is also
transparent! What can I do? I tested nearly everything.

This, if my understanding is not correctly, sounds like a bug or an
erroneous behavior.

The raster data are 8 bit TIFFs with nearly the same color table (about 34
entrys), but always in a different order.

This should mean that a color expansion is required if the various
palettes are not completely equal.
I have a question on this how did you generate the pyramid? Can you
copy and paste the properties file for the pyramind and one of the
mosaics? I think it would be useful to have two of your tiles to play
with them myself.

Simone.

Who can help m
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spillocaster · June 23, 2008, 7:34am

Hi,

- yes, I want to transform the green pixels from the input images to be
transparent. The input images have no Transparency (Neither alpha nor
transparent pixels).

- I wrote something wrong in my first message. I didn't used the image
pyramid plugin, is only used the image mosaic plugin.

- content of my .properties file:

Name=15_geoactive

Levels=2.38865710449,2.38865710449

LevelsNum=1

Envelope2D=644998.805671,5930001.509073 1694998.490927,7330001.194329

NumFiles=1187

ExpandToRGB=true

- I attached two images
http://www.nabble.com/file/p18064013/15_1020_7255.zip 15_1020_7255.zip
http://www.nabble.com/file/p18064013/15_1020_7280.zip 15_1020_7280.zip

thanks
Jürgen

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Piero_Campa · March 15, 2010, 11:37am

Hi to all,
I have a little question: I created a custom .PAL file and I stored it in
$GEOSERVER_DATA_DIR/palettes directory.

Do you know how can I set a transparent color?

Meanwhile I'll keep on trying. :working:
Thanks guys.
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Piero_Campa · March 15, 2010, 2:17pm

...the rasters which I want to be styled with a transparent color are
GeoTiffs. I ask for GIFs via WMS.

Piero Campa wrote:

Hi to all,
I have a little question: I created a custom .PAL file and I stored it in
$GEOSERVER_DATA_DIR/palettes directory.

Do you know how can I set a transparent color?

Meanwhile I'll keep on trying. :working:
Thanks guys.

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Andrea_Aime3 · March 16, 2010, 6:24pm

Piero Campa ha scritto:

...the rasters which I want to be styled with a transparent color are
GeoTiffs. I ask for GIFs via WMS.

Piero Campa wrote:

Hi to all, I have a little question: I created a custom .PAL file and I stored it in
$GEOSERVER_DATA_DIR/palettes directory.

Do you know how can I set a transparent color?

You don't. The original image needs to be RGBA and thus have
transparent pixels natively.

If that does not help open an issue on jira.codehaus.org
and attach the GeoTiff (or a small sample of it), the PAL,
the request and what you expected as a result

Cheers
Andrea

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