Horrible Looking WMS Raster Imagery

[Eijnden, B. van den (Bart)]

Jennifer,
 
try to use PNG24 for the parameter named image_type in chameleon.xml.
 
Best regards,
Bart

-----Oorspronkelijk bericht-----
Van: UMN MapServer Users List [mailto:MAPSERVER-USERS at LISTS.UMN.EDU]Namens
Jennifer Zeisloft
Verzonden: dinsdag 24 januari 2006 6:04
Aan: MAPSERVER-USERS at LISTS.UMN.EDU
Onderwerp: Re: [UMN_MAPSERVER-USERS] Horrible Looking WMS Raster Imagery


Hi Frank,

Thanks for the response, Frank.  It is sounding more and more like this is a
question I ought to forward to the chameleon list - because I am also not
sure how to generate 24bit output with chameleon!  

I appreciate the much needed direction!

Thanks all!

Jennifer


On 1/23/06, Frank Warmerdam < warmerdam at pobox.com
<mailto:warmerdam at pobox.com> > wrote: 

On 1/23/06, Brent Pedersen < bpederse at nature.berkeley.edu
<mailto:bpederse at nature.berkeley.edu> > wrote:
> have you tried using image/jpeg?

In addition to fetching data from the remote WMSes as 
JPEG, it is also necessary for mapserver to generate 24bit
output (JPEG or PNG24 for instance).  I don't know how to
do that with Chameleon myself, but I'm sure there is a setting
somewhere.

I think Ed is right that the problem is 24bit to 8bit color 
conversion with correspondingly poor color resolution.
Given sufficient blotchiness from this conversion it can
even appear that spatial resolution is degraded (though it
isn't actually).

Best regards, 
--
---------------------------------------+------------------------------------
--
I set the clouds in motion - turn up   | Frank Warmerdam,
warmerdam at pobox.com <mailto:warmerdam at pobox.com> 
light and sound - activate the windows | http://pobox.com/~warmerdam
<http://pobox.com/~warmerdam> 
and watch the world go round - Rush    | Geospatial Programmer for Rent






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