Pleyer, Walter wrote:
Thanks, Flavio!
The TRANSPARENCY Parameter worked - kind of.
Now when I set the TRANSPARENCY parameter of the layer object to varying
values, the resulting image gets paler or less pale, but unfortunately
not transparent in the sense, that I see the underlying image through.
Do you have any ideas, hints?
Walter,
Are you wanting to return an image from mapserver where the final
image includes alpha type transparency? What is your output format?
I suspect you will need custom OUTPUTFORMAT declaration indicating a
32bit RGBA PNG output format if you want partial raster transparency.
I'd encourage you to read up on the OUTPUTFORMAT declaration, but something
like this at the MAP level might work.
IMAGETYPE png32
OUTPUTFORMAT
NAME png32
DRIVER "GDAL/PNG"
IMAGEMODE RGBA
TRANSPARENT ON
END
Good luck,
Example:
LAYER
NAME "Switzerland Relief"
MINSCALE 100000
TYPE RASTER
TRANSPARENCY 50
STATUS ON
DATA "Relief.tif"
PROCESSING "RESAMPLE=AVERAGE"
PROJECTION
"init=world:CH1903"
END
END
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