[mapserver-users] Turn off anti-alias Mapserver 6.0

[Peter Hopfgartner]

Hi Thomas

You could try to reduce the image size using 8bit PNGs, see the 3rd 
output format in http://mapserver.org/mapfile/outputformat.html.

Peter

On 04/12/2012 06:20 AM, Thomas Joseph wrote:
>
> We have recently upgraded from Mapserver 5.7 to 6.0 and although the 
> AGG anti-alias lines look great the output image size has increased 
> significantly from the previous rendering without anti-alias.  I was 
> just wondering if  there is a way to turn off the anti-alias for 
> polyline rendering in Mapserver 6.0.  From the documentation it 
> appeared that the previous GD driver did not include anti-alias by 
> default.   We have attempted to switch the outputformat from the new 
> default AGG to the previous GD driver using the outputformat directive 
> in the map file as shown below.  This changed the image size slightly 
> suggesting that mapserver was using a different driver to render, 
> however the lines were still rendered with anti-alias on and the image 
> was still relatively large compared to previous mapserver verison.
>
> OUTPUTFORMAT
>
>   NAME "GDpng"
>
>   DRIVER GD/PNG
>
>   MIMETYPE "image/png"
>
>   IMAGEMODE RGB
>
>   EXTENSION "png"
>
> END
>
> Previously in Mapserver 5.7 we did not specify an outputformat we 
> simply used IMAGETYPE PNG24 and the output was generated without 
> anti-alias.  Any suggestions would be greatly appreciated.  If you 
> need additional information let me know.
>
> tom
>
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-- 

Peter Hopfgartner
http://www.r3-gis.com


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