Anti Aliasing

[Doyon, Jean-Francois]

Interesting ... My reading of the docs suggests that TRANSPARENCY ALPHA
should only respect the alpha channel in pixmap symbols ...

Yet apparently rendered line work (which isn't pixmap based) is also
"smoothed"?  Is that right?

J.F.

-----Original Message-----
From: UMN MapServer Users List [mailto:MAPSERVER-USERS at lists.umn.edu] On
Behalf Of ramesh karra
Sent: May 16, 2006 6:07 PM
To: MAPSERVER-USERS at lists.umn.edu
Subject: Re: [UMN_MAPSERVER-USERS] Anti Aliasing

Thanks steve!

I have upgraded to 4.8.3 and the roads/lines are smooth... Looks really
good.

Thanks
Ramesh

--- Steve Lime <Steve.Lime at DNR.STATE.MN.US> wrote:

> You need 4.8 or later to use antialiasing... ;-)
> 
> >>> ramesh karra <karrarm at yahoo.com> 5/16/2006
> 1:35:15 PM >>>
> Thanks steve!
> 
> I made the changes you suggested but I started getting script errors. 
> It looks like the errors are due to 'PNG24'. I am using Mapserver 4.6. 
> Do I need to use
> 4.8 or later to successfully use PNG24?
> 
> Thanks
> Krishna
> 
> --- Steve Lime <Steve.Lime at DNR.STATE.MN.US> wrote:
> 
> > You need a couple of other things:
> > 
> >   - a 24-bit output format (e.g. IMAGETYPE PNG24)
> >   - alpha blending turned on for the layer (e.g.
> > TRANSPARENCY ALPHA)
> > 
> > That should get it working...
> > 
> > Steve
> > 
> > Stephen Lime
> > Data & Applications Manager
> > 
> > Minnesota DNR
> > 500 Lafayette Road
> > St. Paul, MN 55155
> > 651-259-5473
> > >>> ramesh karra <karrarm at YAHOO.COM> 05/15/06 6:49
> > PM >>>
> > Hi,
> > 
> > I have added 'ANTIALIAS TRUE' to all my STYLE objects but I do not 
> > see any difference in the map that's displayed. I was hoping to see 
> > smooth lines but there was no difference in the way 
> > lines(representing
> > roads)
> > are drawn with or without anti-aliasing. Is this
> the
> > expected behavior? How can I get smooth lines?
> > 
> > My layer is defined as follows:
> > 
> > LAYER  
> >     NAME         roads
> >     DATA         droad1
> >     STATUS       OFF
> >     TYPE         LINE
> > 
> >     PROJECTION
> >  	 "init=epsg:4326"
> >     END
> >   
> >     CLASS
> >       NAME       "Roads"
> >       MAXSCALE     80000
> >       MINSCALE     20000
> >       STYLE
> > 	ANTIALIAS    TRUE
> > 	COLOR	     150 150 150
> > 	WIDTH        3
> >       END  
> >       STYLE
> > 	ANTIALIAS    TRUE
> >         COLOR	     255 255 255
> > 	WIDTH        1
> >       END   
> >     END
> > END
> > 
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