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

[Havard Tveite]

If you have moved to 6.2, you can consider using
ANCHORPOINT
http://mapserver.org/trunk/en/mapfile/symbol.html

On earlier verions you could try the approach suggested
in
http://mapserver.org/trunk/en/mapfile/symbology/construction.html#tricks

But that is kind of similar to what you have tried yourself.
To avoid gaps you could try this:

SYMBOL
     NAME 'SQUARE_FULL'
     TYPE vector
     FILLED true
     POINTS
         0 0
         0 1
         1 1
         1 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
     STYLE
         SYMBOL "SQUARE_FULL"
         COLOR [LEFT_CLR]
         SIZE 10
     END
     STYLE
         SYMBOL "SQUARE_R"
         COLOR [RIGHT_CLR]
         SIZE 10
     END
  END

It seemed to work for me on 6.0.

Håvard

On 10/9/2012 10:32 PM, geographika wrote:
>   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
>
>
>
> _______________________________________________
> mapserver-users mailing list
> mapserver-users at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/mapserver-users

-- 
Håvard Tveite
Department of Mathematical Sciences and Technology, UMB
Drøbakveien 31, POBox 5003, N-1432 Ås, NORWAY
Phone: +47 64965483 Fax: +47 64965401 http://www.umb.no/imt/