[mapserver-users] Border style of polygon

[Denis Rykov]

I have WMS polygonal layer and want to draw polygon's border with the
following style:

http://i.stack.imgur.com/J2A7x.png

My symbol's description:

SYMBOL
  NAME "double_line"
  TYPE vector
  POINTS
    0 0 1 0 -99 -99 0 1 1 1
  END
END

CLASS section in mapfile:

CLASS
  STYLE
    OUTLINECOLOR 255 0 0
    SYMBOL 'double_line'
    SIZE 3
    WIDTH 1
  END

But in this case you can see self intersection in polygon's edge:

http://i.stack.imgur.com/5Etem.png

What is the righ way to get correct border style?

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