[ka-Map-users] Help, I'm getting some image weirdness

[Stephen Woodbridge]

Paul Spencer wrote:
> Steve,
> 
> I had the same problem.  It turns out that the tiling code in  tile.php 
> tries to allocate a transparent colour from the background  color of the 
> mapfile.  When tile.php loads/slices/saves the tiles,  some portion of 
> the text becomes transparent resulting in this  effect.  Try changing 
> your background color in your map file or (if  you are not using groups) 
> removing the line that assigns a  transparent colour index.

Yeah, I figured it out while I was sleeping that the problem was that 
the map object has TRANSPARENCY ON so I can do the AA stuff. Commenting 
out the two lines with transparency setting stuff in tile.php fixed the 
problem.

This issue should get fixed in tile.php maybe by setting some metadata 
in the map object to control this.

> Cheers
> 
> Paul
> 
> PS did you change the hardness factor for antialiasing?  what did you  
> change it to?

I used the default and it looks very nice. have you gotten better 
results by fiddling with the value?

-Steve

> On 3-Apr-06, at 11:15 PM, Stephen Woodbridge wrote:
> 
>> Hi Paul, et al,
>>
>> I am getting some serious image weirdness in ka-map. The image as  
>> compared to that generated by /cgi-bin/mapserv is nice and clean  but 
>> the ka-map generated images have serious problems with the  labels an 
>> maybe other stuff.
>>
>> cgi-bin version:
>>
>> MapServer version 4.9 OUTPUT=GIF OUTPUT=PNG OUTPUT=JPEG OUTPUT=WBMP  
>> OUTPUT=SVG SUPPORTS=PROJ SUPPORTS=FREETYPE SUPPORTS=THREADS  
>> INPUT=EPPL7 INPUT=JPEG INPUT=POSTGIS INPUT=SHAPEFILE DEBUG=MSDEBUG
>>
>>
>> php version:
>>
>> MapServer Version     MapServer version 4.9 OUTPUT=GIF OUTPUT=PNG  
>> OUTPUT=JPEG OUTPUT=WBMP OUTPUT=SVG SUPPORTS=PROJ SUPPORTS=FREETYPE  
>> SUPPORTS=THREADS INPUT=EPPL7 INPUT=JPEG INPUT=POSTGIS  INPUT=SHAPEFILE 
>> DEBUG=MSDEBUG
>> PHP MapScript Version     ($Revision: 1.246 $ $Date: 2006/02/26  
>> 18:09:47 $)
>>
>> I have attached some tile samples. These are both being generated  
>> using the same mapfile and at the same scale. The scale breaks are  
>> not near the scales so it is not a problem of rounding of the scale  
>> causing different classes/layers to be applied.
>>
>>   OUTPUTFORMAT
>>     NAME PNG8
>>     DRIVER "GD/PNG"
>>     EXTENSION "png"
>>     MIMETYPE "image/png"
>>     IMAGEMODE RGBA
>>     TRANSPARENT OFF
>>     FORMATOPTION "QUANTIZE_FORCE=ON"
>>     FORMATOPTION "QUANTIZE_DITHER=ON"
>>     FORMATOPTION "QUANTIZE_COLORS=256"
>>   END
>>
>> I get the same results with "QUANTIZE_DITHER=OFF"
>>
>> I'm totally at a loss to fix this and need ti for a show on  
>> Wednesday. So any help would be appreciated.
>>
>> -Steve
>> <tile-1.php>
>> <mapserv-cgi.png>
>> _______________________________________________
>> ka-Map-users mailing list
>> ka-Map-users at lists.maptools.org
>> http://lists.maptools.org/mailman/listinfo/ka-map-users
> 
> 
> +-----------------------------------------------------------------+
> |Paul Spencer                           pspencer at dmsolutions.ca   |
> +-----------------------------------------------------------------+
> |Applications & Software Development                              |
> |DM Solutions Group Inc                 http://www.dmsolutions.ca/|
> +-----------------------------------------------------------------+
> 
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