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:[EMAIL PROTECTED] On Behalf Of Zhonghai Wang
Sent: 16 May 2006 16:14
To: [email protected]
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 <[EMAIL PROTECTED]> 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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