[mapserver-users] transparent symbol clobbering

[Ben Brehmer]

I have a very simple mapfile to display a bunch of points as PNG symbols.

Problem is that the transparent part of the symbols are clobbering each 
other with the background color (see attached image). What I would like 
to see is a whole wack of merged together symbols when they are 
overlapping without the background color coming through.

Any thoughts as to what could be causing this?

Cheers,

Ben Brehmer



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The relevant parts of my very simple map file:

MAP

  TRANSPARENT ON

  OUTPUTFORMAT
    NAME PNG24
    DRIVER "GD/PNG"
    MIMETYPE "image/png"
    EXTENSION "png"
    IMAGEMODE RGBA
    TRANSPARENT ON
  END

LAYER
    TRANSPARENCY 100
    CLASS
      STYLE
         SYMBOL "../../htdocs/images/markers/multi_arrow.png"
         SIZE 32
      END #STYLE
    END #CLASS
....
..
.

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