[mapserver-users] Difference in GD vs AGG PNG output -- seams in my shape files.

[Yves Moisan]

> Hi,
>
> I recently upgraded from 5.2.x to 5.6.1, and from GD to AGG.
>
> Here is my output:
>
> AGG: http://i44.tinypic.com/5oh261.png
>
> GD: http://i39.tinypic.com/2h4j409.png
>
> Visual Representation of the shapefile: http://i44.tinypic.com/1zz2u76.png
>
> Look north of Cancun -- the AGG driver is showing seams where the 
> polygons connect in my shape file.  It doesn't do it for all of them, 
> but I see it a lot, especially when the seams are not straight N/S or 
> E/W.  I feel that it has something to do with AGG's antialiasing, but 
> I've not been able to pin it down.
>
> Is there any way to resolve this?  I'd really like to use the AGG 
> driver, I love the output it produces, minus the white lines!
>
> Mark

Give that url a try : 
http://linfiniti.com/2010/03/comparing-renderers-in-mapserver/

HTH,

Yves