[mapserver-users] Re: Transparency via WMS request?

[Robert Sanson]

Is it possible to get layer transparency when outputformat=PDF?
 
Thanks,
 
Robert Sanson

>>> "Roger André" <randre at gmail.com> 25/09/2008 10:36 a.m. >>>
Thanks to some help from a fellow GIS developer, I think I've narrowed
the problem down to the OUTPUTFORMAT section of my mapfile.  Changing
from the AGG to GD driver seemed to take care of the problem.  Will need
to do some additional futzing to see if I can get it working with AGG.
--



On Wed, Sep 24, 2008 at 1:38 PM, Roger André <randre at gmail.com> wrote:


Ok, this is driving me bonkers.  I have a raster image with nodata
values set to be transparent.  When I make requests to this layer in
"mode=map", it works beautifully, and the nodata values are
transparent.

-
http://localhost/cgi-bin/mapserv?map=/var/www/mapfiles/temp/temp.map&mode=map


However, when I try to view the same data via a WMS request, the nodata
values are displayed in black.

- http://localhost/cgi-bin/mapserv?map=/var/www/mapfiles/temp/temp.map

&SERVICE=WMS
&version=%221.1.122
&REQUEST=GetMap
&LAYERS=imagery
&STYLES=
&BBOX=-180,-90,180,90
&WIDTH=600
&HEIGHT=500
&FORMAT=png
&SRS=epsg:4326

I have tried doing a couple of things to fix this, none of which has
worked:
- added "wms_transparent"     "TRUE" to METADATA section of LAYER
- added "&TRANSPARENT=TRUE" to the end of the WMS request
- made sure that in OUTPUTFORMAT I have all of these:
  OUTPUTFORMAT
   NAME png
   DRIVER "AGG/PNG"
   MIMETYPE "image/png"
   IMAGEMODE RGBA
   EXTENSION "png"
   FORMATOPTION "TRANSPARENT=ON"
   FORMATOPTION "INTERLACE=OFF"
   TRANSPARENT ON
  END #end outputformat

Please, can anyone tell me what I'm missing?  

Thanks,

Roger
--





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