On Tue, 7 Jul 2009, Edzer Pebesma wrote:
Patrick Giraudoux wrote:
Edzer Pebesma a écrit :
Patrick Giraudoux wrote:
Dear listers,
I would like to add the border of a country (SpatialPolygons object
called ChinaBorder) in a spplot built as following:
mypal<-colorRampPalette(c("white", "cyan",
"blue","green","yellow","red"))
statSpat<-SpatialPointsDataFrame(chinagrid,data.frame(n=z))
gridded(statSpat)<-TRUE
spplot(statSpat,col.regions=mypal)
I cannot managed to overlap ChinaBorder to statSpat with the 'panel'
argument of spplot.
Any idea about how to proceed ?
Patrick, you might want to try
spplot(statSpat, col.regions = mypal, sp.layout = list("sp.polygons",
ChinaBorder))
P
Exactly what I need (the way to state was unclear to me in the doc),
except the image is overlapping the border when I would like to get
the reverse (the contour over the image). Is there a way to make it ?
Cheers,
Patrick
Try
spplot(statSpat, col.regions = mypal, sp.layout = list("sp.polygons",
ChinaBorder, first = FALSE))
or maybe TRUE.
Or even Edzer's own trick (IIRC) of turning polygons into lines:
spplot(statSpat, col.regions = mypal, sp.layout = list("sp.lines",
as(ChinaBorder, "SpatialLines")))
with possible line width, type and colour arguments.
Roger
--
Edzer
--
Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Helleveien 30, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43
e-mail: roger.biv...@nhh.no
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