sp.pagefn(n)
spplot.key(sp.layout, rows = 1, cols = 1)
SpatialRingsRescale(obj, offset, scale = 1, fill = "black", col = "black",...)
sp.lines(obj, col = 1, ...)
sp.points(obj, pch = 3, ...)
sp.polygon(obj, col = 1, ...)
sp.text(loc, txt, ...)
SpatialRingsRescale
; of class SpatialLines-class,
Slines-class or