[R-sig-Geo] sp.text background

[Edzer Pebesma]

There might be multiple ways of doing this. The following stays in the
realm of using spatial elements, here a rectangular polygon which is
colored white and drawn after the grid map has been drawn.

library(sp)
data(meuse.grid)
gridded(meuse.grid) = ~x+y
x = c(179500,331000)
bx = cbind(c(x[1],x[1]+300,x[1]+300,x[1],x[1]),
    c(x[2],x[2],x[2]+200,x[2]+200,x[2]))
p = SpatialPolygons(list(Polygons(list(Polygon(bx)), "ID")))
spl1 =list("sp.polygons", p, col = 0, fill='white',first=F)
spl2 =list("sp.text", x+150,"hello")
spplot(meuse.grid[3], sp.layout=list(spl1,spl2))


On 11/07/2010 09:02 AM, Alexandru Dumitrescu wrote:
> Dear list,
> 
> For my daily precipitation maps I need to put on the spplot map the first
> maximum tree precipitation values.
> The only space left for that element it overlaps the border of
> a neighboring country.
>  I am wondering if is there a way to add a background to sp.text element; I
> searched
>  through all the sp.text args but I didn’t find a solution for adding a
> colored (white) background.
> 
> 
> Thank you,
> Alexandru Dumitrescu
> 
> 	[[alternative HTML version deleted]]
> 
> 
> 
> 
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-- 
Edzer Pebesma
Institute for Geoinformatics (ifgi), University of Münster
Weseler Straße 253, 48151 Münster, Germany. Phone: +49 251
8333081, Fax: +49 251 8339763  http://ifgi.uni-muenster.de
http://www.52north.org/geostatistics      e.pebesma at wwu.de