How to Construct Railroad Style lines?

[Bob Basques]

Bill,

Here's how we do it.  Found it in one of the old posts from this list 
somewhere I think originally.  You should be able to tweak the settings 
more to your liking too.

  LAYER
    NAME 'railroads'
    DATA 'SURVEY/2003_12/RAILROAD/railroads'
    GROUP 'planimetrics_lines'
    STATUS DEFAULT
    TYPE LINE
    CLASS
      COLOR 255 200 0
      SIZE 1
      SYMBOL 'circle'
      OVERLAYSYMBOL dashed2  ## Railroad track linetype
      OVERLAYCOLOR 255 200 0
      OVERLAYSIZE 3
    END
  END

  SYMBOL
    NAME 'circle'
    TYPE ELLIPSE
    POINTS 1 1 END
    FILLED TRUE
  END

  SYMBOL
    NAME "dashed2"
    TYPE ellipse
    POINTS
     1 1
    END
    STYLE
     1 7
    END
  END


Bill Thoen wrote:
> It seems that line styles for railroads (i.e. lines that look like  
> ---|--|--|--|--) are pretty hard to find in the documentation. I did 
> find one googlit on the subject from 2003 
> (http://mapserver.gis.umn.edu/data2/wilma/mapserver-users/0302/msg00716.html) 
> but I can't seem to make it work. The following map file excerpt built 
> from that suggestion just seems to produce a simple red line. I don't 
> see how this makes the "tie" lie crossways to the track line. Does 
> anyone know what I did wrong? Is there a more modern solution?
>
> MAP
>   ...
>   SYMBOL
>       NAME 'line'
>       TYPE ELLIPSE
>       FILLED TRUE
>       POINTS 1 1 END
>    END
>    SYMBOL
>       NAME 'tie'
>       TYPE ELLIPSE
>       FILLED TRUE
>       POINTS 1 1 END
>       STYLE 1 3 END
>    END
> ...
>   LAYER
>       NAME railroads
>       GROUP transportation
>       TYPE LINE
>       STATUS ON
>       CONNECTIONTYPE OGR
>       CONNECTION "railroads.TAB"
>       LABELITEM "Name"
>       CLASS
>          NAME "Railroads"
>          COLOR 255 100 100
>          SYMBOL 'line'
>          SIZE 1
>          OVERLAYSYMBOL 'tie'
>          OVERLAYSIZE 3
>       END
>       PROJECTION
>          "init=epsg:4326"
>       END
>    END
> ...
> END
>
>
> TIA,
> - Bill Thoen
>
>   


-- 

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