[mapserver-users] How do you display a symbol with two colours?

[geographika]

Hi,

I'm trying to draw a point layer, with each point represented in two 
colours (for example a square split in two with one half red and one 
half green).
I can create the symbols and apply the data but either the squares are 
the incorrect shape, or they overlap. The closest I got was with the 
following CLASS definition, but then it appeared the colours were shown 
on the wrong side of the square.
Images and further details at 
http://gis.stackexchange.com/questions/35283/mapserver-symbol-with-two-colours
Symbol definitions:
|SYMBOL
    NAME 'SQUARE_L'
    TYPE vector
    FILLED true
    POINTS
        0 0
        0 1
        0.5 1
        0.5 0
        0 0
    END
END
SYMBOL
    NAME 'SQUARE_R'
    TYPE vector
    FILLED true
    POINTS
        0.5 0
        1 0
        1 1
        0.5 1
        0.5 0
    END
END

# CLASS definition


        

I'd like to symbolise a point dataset with a square (or circle) using two 
colours. This is useful for displaying values collected on both sides of a road 
(for example).

split symbols

I created two symbols, a left side and right side of the square as shown below:

SYMBOL
    NAME 'SQUARE_L'
    TYPE vector
    FILLED true
    POINTS
        0 0
        0 1
        0.5 1
        0.5 0
        0 0
    END
END
SYMBOL
    NAME 'SQUARE_R'
    TYPE vector
    FILLED true
    POINTS
        0.5 0
        1 0
        1 1
        0.5 1
        0.5 0
    END
END

Then in my LAYER I can create a CLASS using the two different STYLES:

CLASS
    STYLE
        SYMBOL "SQUARE_L"
        COLOR [LEFT_CLR]
        SIZE 10
    END
    STYLE
        SYMBOL "SQUARE_R"
        COLOR [RIGHT_CLR]
        SIZE 10
    END
 END


|

Any help appreciated,

Seth
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