Anti Aliasing

[Zhonghai Wang]

that's it!!! It's perfect!!

thanks, Perry.

16.05.2006

On 5/16/06, Pericles S. Nacionales <naci0002 at umn.edu> wrote:
>
> Get rid of the OUTPUTFORMAT object and just add IMAGETYPE PNG24.  See
> what happens.
>
> -Perry
>
> Zhonghai Wang wrote:
> > Hi, Jacob,
> >
> > you mean like this:
> >
> > *****output format:
> >
> > OUTPUTFORMAT
> >     NAME "PNG24"
> >     MIMETYPE "image/PNG"
> >     DRIVER "GD/PNG"
> >     EXTENSION "PNG"
> >     IMAGEMODE RGBA
> >     #TRANSPARENT ON
> >     #TRANSPARENCY ALPHA
> >   END
> >
> > ******layer definition:
> > LAYER
> >     NAME "railway"
> >     STATUS DEFAULT
> >     TYPE LINE
> >     CONNECTIONTYPE OGR
> >     CONNECTION "CA_NAV_RAILRDS.TAB"
> >     MAXSCALE 8000
> >     SYMBOLSCALE 4000
> >     TRANSPARENCY ALPHA
> >     PROJECTION
> >       "init=epsg:4326"
> >     END
> >     CLASS
> >       NAME "railway"
> >       STYLE
> >         SYMBOL 'point'
> >         COLOR 0 0 0
> >         SIZE 5
> >         MINSIZE 1
> >         MAXSIZE 5
> >         ANTIALIAS TRUE
> >       END
> >       STYLE
> >         SYMBOL "dashedline"
> >         COLOR 255 255 255
> >         SIZE 3
> >         MINSIZE 0
> >         MAXSIZE 3
> >         ANTIALIAS TRUE
> >       END
> >     END
> >
> > **
> >
> > if all the definition is right, this function does not really make the
> > output image nicer. and I've noticed that ANTIALIAS TRUE/FALSE is only
> > useful for truetype font, but not for line features, which means only
> > for truetype font symbols. or Did I do anything wrong?
> >
> >
> > On 5/16/06, *Delfos, Jacob* <Jacob.Delfos at maunsell.com
> > <mailto:Jacob.Delfos at maunsell.com>> wrote:
> >
> >     Zhonghai,
> >
> >     PNG is 8bit, PNG24 is 24bit colour, with an 8bit transparency. So
> for
> >     the ALPHA option, I think you need PNG24. Try this definition:
> >
> >     OUTPUTFORMAT
> >       NAME PNG24
> >       DRIVER "GD/PNG"
> >       MIMETYPE "image/png"
> >       EXTENSION PNG
> >       IMAGEMODE RGBA
> >     END
> >
> >     Then put:
> >
> >     TRANSPARENCY ALPHA
> >
> >     in your layer definition (not in OUTPUTFORMAT).
> >
> >     regards,
> >
> >     Jacob
> >
> >
> >
> >     ________________________________
> >
> >            From: UMN MapServer Users List
> >     [mailto:MAPSERVER-USERS at LISTS.UMN.EDU
> >     <mailto:MAPSERVER-USERS at LISTS.UMN.EDU>] On Behalf Of Zhonghai Wang
> >            Sent: 16 May 2006 16:14
> >            To: MAPSERVER-USERS at LISTS.UMN.EDU
> >     <mailto:MAPSERVER-USERS at LISTS.UMN.EDU>
> >            Subject: Re: [UMN_MAPSERVER-USERS] Anti Aliasing
> >
> >
> >            Hi,
> >
> >            I am interested in this question, and I've tried like this:
> >
> >            *****
> >            OUTPUTFORMAT
> >                NAME "PNG"
> >                MIMETYPE "image/PNG"
> >                DRIVER "GD/PNG"
> >                EXTENSION "PNG"
> >                IMAGEMODE RGBA
> >                TRANSPARENCY ALPHA
> >              END
> >            *****
> >            I've noticed that there is no PNG24 output image format in
> the
> >     mapfile reference document, and therefore I've used PNG.
> >
> >            but, I get the followig error message:
> >
> >            loadOutputFormat(): Unknown identifier. Parsing error near
> >     (TRANSPARENCY):(line 114)
> >
> >            which means I caon only use TRANSPARENT as the the identifier
> as
> >     listed in the mapfile reference document, and this parameter can
> >     only be
> >     truned on or off.
> >
> >            any further ideas, Steve?
> >
> >            1000 thanks.
> >
> >            zhonghai
> >
> >
> >            On 5/16/06, ramesh karra <karrarm at yahoo.com
> >     <mailto:karrarm at yahoo.com>> wrote:
> >
> >                    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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> >
> >
> >
>
>
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