[mapserver-users] quality of 8bit image in 6.0

[Lime, Steve D (DNR)]

Rich: Any chance you could put together a test case? Also, have you tried IMAGETYPE PNG8?

Steve
________________________________________
From: mapserver-users-bounces at lists.osgeo.org [mapserver-users-bounces at lists.osgeo.org] on behalf of Richard Greenwood [richard.greenwood at gmail.com]
Sent: Saturday, November 12, 2011 5:43 PM
To: mapserver
Subject: [mapserver-users] quality of 8bit image in 6.0

I can not achieve the same quality of 8bit images in MapServer 6.0
that I was able to in 5.6. I have links to 4 example images

1. MapServer 5.6 8bit gif, I like this and this is generally what I want:
http://www.greenwoodmap.com/mapserver-image-quality/mapserv-5.6.gif

2. MapServer 6. 8bit gif. Kind of ragged, center line not in the
middle of grey outlines.
http://www.greenwoodmap.com/mapserver-image-quality/mapserv-6.0.1.gif

3. I submitted a related ticket 3962 which has been fixed (Thank you!)
and the image is slightly better (compare  NW'ly edge of HWY 789 to
above image)
http://www.greenwoodmap.com/mapserver-image-quality/mapserv-6.0-ticket3962.gif

4. A 24bit png from MapServer 6.0. Beautiful, but 9x larger than the
three above.
http://www.greenwoodmap.com/mapserver-image-quality/mapserv-6.0.1.png

I do not have an OUTPUTFORMAT block defined so I'm using default
setting in 5.6 and 6.0. (I've fiddled with OUTPUTFORMAT but I
generally seem to make things worse).

Any suggestions would be greatly appreciated.

Thanks,
Rich

--
Richard Greenwood
richard.greenwood at gmail.com
www.greenwoodmap.com
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