[mapserver-users] image problems

[Lowell Filak]

This may be my fault.
Your .gif image is actually a png and your .png image is actually a jpeg with a quality factor of 0!
If you bring your image up in Imagemagick "display europe.gif" and select 'image info' you will see what I mean.
I may have the documentation wrong as to which file-type is which number in the docs. For now use $mapscript::MS_PNG & $mapscript::MS_JPEG instead of the numbers. I will try to track down what happened and correct the docs asap. The is an update of the docs due to be posted soon anyways (sent in 3-19-2002).
Lowell F.


The following message was sent by "Dylan Keon" <keon at nacse.org> on Thu, 21 Mar 2002 18:18:25 -0800.

> Now that I have the Perl mapscript module working, I tried the simple script
> to create & save images from a shapefile.  I tried creating images in GIF,
> JPG, and PNG formats.  You can see the results at
> www.nacse.org/~keon/temp/test.html , using the shapefile from the Europe
> example.  GIF output looks great, PNG looks terrible, and I can't even get
> usable JPG output (can't view the JPGs in any program).  On the web page you
> can see the parameters I used with the msSaveImage function.
> 
> I suspect I need to compile something differently in the MapScript Perl
> module.  I pasted the current configuration below (contents from Makefile).
> I don't understand why I'm even getting GIF output...I thought the latest
> version of GD (which is what I'm using) doesn't support GIFs?  I must be
> using something other than GD to create GIFs.  I'd really like to create
> good PNGs and JPGs...I don't care so much about GIFs.  I also pasted output
> from mapserv -v below, although I think that doesn't matter since I'm not
> doing anything web-based...I'm just running the standalone Perl script for
> testing.
> 
> I did read messages in the archive related to image quality, and GIF vs.
> PNG, but couldn't find information on my problem.
> 
> Thanks for any help,
> Dylan
> 
> -------------------------------------------------
> >From mapserver_3.5/mapscript/perl/Makefile
> 
> #       DEFINE =>
> q[-DIGNORE_MISSING_DATA -DUSE_EPPL -DUSE_TIFF -DUSE_JPEG -DUSE_GD_PNG -DUSE_
> GD_JPEG -DUSE_GD_WBMP -DUSE_GD_FT]
> #       INC => q[-I/usr/local/etc/mapserver_3.5 -I/usr/local/include]
> #       LIBS =>
> [q[-L/usr/local/etc/mapserver_3.5 -lmap -lgd -L/usr/local/lib -l
> #       NAME => q[mapscript]
> #       OBJECT => q[mapscript_wrap.o]
> 
> -------------------------------------------------
> >From ./mapserv -v
> 
> MapServer version 3.5 OUTPUT=PNG OUTPUT=JPEG OUTPUT=WBMP SUPPORTS=TTF
> INPUT=TIFF INPUT=EPPL7 INPUT=JPEG INPUT=POSTGIS INPUT=SHAPEFILE
> -------------------------------------------------
>