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<br>
Sorry Glenn, I don't have an answer, but I've been dealing with the same
problem.<br><br>
Transparency seems to work as expected with:<br><br>
OUTPUTFORMAT<br>
NAME png24<br>
DRIVER "GD/PNG"<br>
MIMETYPE "image/png"<br>
IMAGEMODE RGBA<br>
EXTENSION "png"<br>
TRANSPARENT ON<br>
END<br><br>
but not with:<br><br>
OUTPUTFORMAT<br>
NAME 'AGG'<br>
DRIVER AGG/PNG<br>
IMAGEMODE RGBA<br>
FORMATOPTION "PALETTE_FORCE=TRUE"<br>
FORMATOPTION "PALETTE="<br>
TRANSPARENT ON<br>
END<br><br>
It's as if with AGG/PNG the TRANSPARENT ON setting is completely
ignored.<br><br>
Mike<br><br>
<br>
At 10:52 AM 04/02/2009, gwaldron wrote:<br><br>
<br>
<blockquote type=cite class=cite cite="">I'm trying to use IMAGECOLOR to
try to force all pixels of a certain color to<br>
become fully transparent, but I am not having any luck getting it to
work.<br><br>
My output format it AGG/PNG, RGBA, TRANSPARENT ON.<br><br>
I have a shapefile layer set to COLOR 0 50 100, and my map-level
IMAGECOLOR<br>
set to the same. I was hoping all the polys in the shapefile would render
as<br>
transparent pixels, but no luck; they just show up as blue
polygons.<br><br>
What am I doing wrong here? Thanks.<br><br>
-----<br>
Glenn Waldron * Pelican Mapping * gwaldron@pelicanmapping.com * +1 703
652<br>
4791<br>
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