Hi, Perhaps you cannot literally set a colour as transparent in a tiff but for sure you can define a nodata value and then applications can make nodata pixels transparent. That is the most normal way to do it with Mapserver and OFFSITE. I believe that Mapserver does not even care if tiff has a nodata tag set but you can give whatever value for offsite in a mapfile.
I have not played at all with alpha, but perhaps there is some way to give a list of pixel values which should be transparent and convert them all to a suitable alpha channel value. -Jukka Rahkonen- Fernando Norte wrote: Hi Christoph, I try to understand, how did you set the specific color to transparent in a TIFF? For raster you can set the level of transparency/opacity to the image not to a color. Att, Fernando Norte Desenvolvedor SIGWeb tel.(31) 2533.9900 cel.(31) 9119.8814 skype: fernandoglobalgeo [http://globalgeo.com.br/assinaturas/logo.png] Endereço: Alameda do Ingá, 88, 6º andar, Vale do Sereno Nova Lima/MG - CEP: 34.000-000 www.globalgeo.com.br<http://www.globalgeo.com.br/> "O presente documento pode conter material confidencial ou seu sigilo é protegido por lei. Quaisquer informações nele contida são destinadas exclusivamente ao(s) seu(s) destinatário(s) não devendo em nenhuma hipótese ser repassado a terceiros". 2012/5/9 Christoph Schumacher <christoph.schumac...@pbs-schumacher.de<mailto:christoph.schumac...@pbs-schumacher.de>> Hello everybody, I have a problem setting up my wms. I have multiple tiff images that have different colours to be set up as transparaent. With the offsite parameter I can only set one colour transparent. Now my question is: Is there a way to make various colour transparent?? best wishes and thank you very much christoph _______________________________________________ mapserver-users mailing list mapserver-users@lists.osgeo.org<mailto:mapserver-users@lists.osgeo.org> http://lists.osgeo.org/mailman/listinfo/mapserver-users
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