Extra pixel around square vector filler for polygon

[Sean Gillies]

I was able to confirm this extra pixel. As far as I can tell, it's  
not just square symbols. A 4 pixel wide (for example) vector symbol  
is repeated in 5x5 blocks within the fill.

Sean

On Dec 28, 2005, at 4:54 PM, Jani Averbach wrote:

> Hello,=20
>
> I have a map which uses a checkerboard pattern as polygon filler.
> The filler is a square which consists of four checks (two white, two =
> black),
> and when mapserver renders a polygon using this pattern, it puts an =
> extra
> 1 pixel wide border for east and north side of square.
>
> I will paste example map file and symbol definition at the end of  
> this =
> email,
> so if you have any idea if this is a feature or bug, and how to get  
> rid =
> of this=20
> or what is more appropriate way to draw checkerboard I would be =
> grateful.
>
> BR, Jani
>
> ----------------------8<------------------------8<-----------------
> SYMBOL
>   NAME "checkerboard"
>   TYPE VECTOR
>   POINTS
>     0 0
>     0 1
>     1 1
>     1 0
>     0 0
>     -99 -99
>     1 1
>     1 2
>     2 2
>     2 1
>     1 1   =20
>   END
>   FILLED TRUE
> END
>
> ----------------------8<------------------------8<-----------------
> MAP
> 	SIZE 40 80
> 	SYMBOLSET "symbols/symbols.sym"
> 	EXTENT 0 0 40 80
> 	UNITS METERS
> 	IMAGETYPE PNG
> 	IMAGECOLOR 0 0 0=20
> 	RESOLUTION 96
> =09
> 	LAYER
> 		TYPE POLYGON
> 		STATUS DEFAULT
> 		FEATURE
> 			POINTS
> 				5 44
> 				35 44
> 				35 80
> 				5 80
> 				5 44
> 			END
> 		END
> 		CLASS
> 			STYLE
> 				SYMBOL  "checkerboard"
> 				SIZE 16
> 				COLOR 255 255 255
> 			END
> 		END
> 	END
>
> 	LAYER
> 		TYPE POLYGON
> 		STATUS DEFAULT
> 		FEATURE
> 			POINTS
> 				5 0
> 				35 0
> 				35 36
> 				5 36
> 				5 0
> 			END
> 		END
> 		CLASS
> 			STYLE
> 				SYMBOL  "checkerboard"
> 				SIZE 4
> 				COLOR 255 255 255
> 			END
> 		END
> 	END
> END
>
> ----------------------8<------------------------8<-----------------

---
Sean Gillies
sgillies at frii dot com
http://zcologia.com/news