[ka-Map-users] transparency in DITHERED outputformat

[Sacha Black]

does anyone have an idea or solution for the (old) problem of Bruno
mentioned below?

I want to use DITHERED as my outputformat, but I have two groups:
"base" and a small overlying "air photo".

for the second group, kamap draws the surrounding tiles (outside the
edge of the photo) as a solid color, which hides the BASE group below.

using PNG the groups draw fine (edges are traspaerent), but the tiles
are much bigger... the two OUTPUTFORMATs I tested are below...

sacha

OUTPUTFORMAT
  NAME png
  DRIVER "GD/PNG"
  MIMETYPE "image/png"
  IMAGEMODE  RGBA
  EXTENSION "png"
END

OUTPUTFORMAT
  NAME dithered
  DRIVER "GD/PNG"
  EXTENSION "png"
  MIMETYPE "image/png"
  IMAGEMODE RGBA
  TRANSPARENT ON
  FORMATOPTION "QUANTIZE_FORCE=ON"
  FORMATOPTION "QUANTIZE_DITHER=OFF"
  FORMATOPTION "QUANTIZE_COLORS=256"
END


On Apr 4, 2007 7:22 AM, Bruno Canessa <b.canessa at iol.it> wrote:

> Hi all,
>
> I set up my mapfile and my config.php file in order to use the DITHERED
> outputformat. I can see all layers but without transparency. I mean that
> any layer, vector or raster, hide lower layers.
> Is it normal? Is it possible to activate transparency with DITHERED?
> Maybe I can change something in the OUTPUTFORMAT block?
>
> I use:
>
> OUTPUTFORMAT
>   NAME dithered
>   DRIVER "GD/PNG"
>   EXTENSION "png"
>   MIMETYPE "image/png"
>   IMAGEMODE RGBA
>   TRANSPARENT OFF
>   FORMATOPTION "QUANTIZE_FORCE=ON"
>   FORMATOPTION "QUANTIZE_DITHER=OFF"
>   FORMATOPTION "QUANTIZE_COLORS=256"
> END
>
> I tried to change "TRANPARENT ON" above, but nothing change.
>
> Thank you.
>
> Bruno.
>
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