sp.text background

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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))

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

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Edzer Pebesma
Institute for Geoinformatics (ifgi), University of M?nster
Weseler Stra?e 253, 48151 M?nster, Germany. Phone: +49 251
8333081, Fax: +49 251 8339763  http://ifgi.uni-muenster.de
http://www.52north.org/geostatistics      e.pebesma at wwu.de