Hey guys,<br><br>Have a try resetting your OUTPUTFORMAT to this:<br><br> OUTPUTFORMAT<br> NAME 'AGGA'<br> DRIVER AGG/PNG<br> MIMETYPE "image/png"<br> IMAGEMODE RGBA<br> EXTENSION "png"<br>
FORMATOPTION "INTERLACE=OFF"<br> END<br><br>Transparency works for me with this.<br>--<br><br><div class="gmail_quote">On Wed, Feb 4, 2009 at 11:05 AM, Mike Dunham-Wilkie <span dir="ltr"><<a href="mailto:mike@barrodale.com">mike@barrodale.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div>
<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<div><div></div><div class="Wj3C7c"><br><br>
<br>
At 10:52 AM 04/02/2009, gwaldron wrote:<br><br>
<br>
<blockquote type="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 * <a href="mailto:gwaldron@pelicanmapping.com" target="_blank">gwaldron@pelicanmapping.com</a> * +1 703
652<br>
4791<br>
-- <br>
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Nabble.com.<br><br>
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<tt>----------------------------------------------<br>
Michael Dunham-Wilkie, M.Sc., M.P.A.<br>
Senior Database Analyst<br>
Barrodale Computing Services Ltd. <br>
Tel: (250) 472-4372 Fax: (250) 472-4373 <br>
Web:
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