WMS-Transparency (?)

[Kai Behncke]

On Mon, 8 Jan 2007 14:40:09 +0100, Bart van den Eijnden (OSGIS) wrote
> You should be able to do this by using an SLD. Try something like 
> (not verified!):
> 
> "wms_sld_body" "<StyledLayerDescriptor version='1.0.0'
> xmlns='http://www.opengis.net/sld'
> xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'
> xsi:schemaLocation='http://www.opengis.net/sld
>
http://schemas.opengeospatial.net/sld/1.0.0/StyledLayerDescriptor.xsd'><NamedLayer><Name>YOURLAYERNAME</Name><UserStyle><FeatureTypeStyle><Rule><RasterSymbolizer><Opacity>0.5</Opacity></Rule></FeatureTypeStyle></UserStyle></NamedLayer></StyledLayerDescriptor>"
> 
> Change YOURLAYERNAME into the name of your layer (wms_name).
> 
> See also:
> http://mapserver.gis.umn.edu/data2/wilma/mapserver-users/0406/msg00538.html
> 
> Hope this helps.
> 
> Best regards,
> Bart
> 
Hello List,
thank you for all the hints!!
The WMS-Layer I want transparency for is in original a Vector-Layer,
so I think I can`t use SLD with <RasterSymbolizer> (Ì´m not so much 
in SLD by now)??
I always get error messages then....
(that one: http://mapserver.gis.umn.edu/docs/error/eppl7-error)

I found another solution. For the Layer I want transparency for I`m 
using hatching.

I define it in the symbolfile with:
SYMBOL
NAME "hatch"
TYPE HATCH
END

and in the WMS-Server:
STYLE
SYMBOL 'hatch'
ANGLE 45
COLOR 0 0 0
SIZE  6
WIDTH 1
END

That gives transparency in the client.
It`s not to 100% what I wanted, but nearly :-)

Regards, Kai

--
Dipl.-Geogr. Dipl.-Umweltw. Kai Behncke

Institut für Geoinformatik und Fernerkundung (IGF)
Universität Osnabrück
Kolpingstr. 7
49074 Osnabrück

Raum: 01/308
Tel.: +49 541 969-4450
E-Mail: mailto:kbehncke at igf.uni-osnabrueck.de 
Web:  http://www.igf.uni-osnabrueck.de