(please keep your messages on the list) change pc256 to rgba in your mapfile.
add format:"image/png" to your openlayers options (same level as alpha:true, which is not needed). That said, there still very well could be a bug in the raster classification code as opacity wasn't a first class citizen back in the GD days.... as for client side opacity: add opacity:0.5 to your javascript (same level as isBaseLayer) -- thomas On 18 July 2013 11:46, Guo YU <[email protected]> wrote: > Dear Thomas, > Thanks for your reply. > The mapserver I am using is from MS4W, so it is MS4W Setup Installer > v3.0.6 (May 26, 2012). > What Do you mean by use opacity at the client level? Where should I > set it? > I changed the driver from GD to AGG, but nothing changed. > > OUTPUTFORMAT > NAME "png" > MIMETYPE "image/png" > DRIVER "AGG/PNG" > EXTENSION "png" > IMAGEMODE "PC256" > TRANSPARENT on > END > > > On Thu, Jul 18, 2013 at 10:38 AM, thomas bonfort <[email protected]> > wrote: >> >> Guo, >> >> Why not use opacity at the client level only ? >> That said, this does seem like a bug. Can you specify which mapserver >> version you are using, and which outputformat your are using (and if >> you are using a GD one, try switching to AGG). >> >> -- >> thomas >> >> >> On 18 July 2013 11:28, Guo YU <[email protected]> wrote: >> > >> > Dear All, >> > Since I need to show the code and figures about my problem, I post >> > it >> > on the Stack Exchange. >> > I got problem with Setting a Transparent Raster Layer and then show this >> > layer though OpenLayer. >> > >> > Here is the link : >> > >> > http://gis.stackexchange.com/questions/66388/how-to-make-a-raster-layer-transparent-via-mapserver >> > >> > Thanks for your time. >> > -- >> > YU Guo >> > MSc. Hydroinformatics and Water Management >> > Email: [email protected] >> > Phone: +33 668 195803 >> > >> > >> > >> > >> > _______________________________________________ >> > mapserver-users mailing list >> > [email protected] >> > http://lists.osgeo.org/mailman/listinfo/mapserver-users >> > > > > > > -- > YU Guo > MSc. Hydroinformatics and Water Management > Email: [email protected] > Phone: +33 668 195803 > > > _______________________________________________ mapserver-users mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/mapserver-users
