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...As I am a beginner, I bet I'm running into some really basic problems. Using the example from the Map2poly function in maptools: try <- read.shape("euadmll.shp") mappolys <- Map2poly(try) # this produces 14 warnings() of the type: # 1: level 2 circularity at 62 in: .mtlbuild(.mtafters(r1), rD) # etc # 14: From next release, default hole handling will change in: Map2poly(try) plot(mappolys) Gives an error: Error in plot.polylist(mappolys) : malformed plot order I also get this with Map2ploy(..., raw=FALSE) I have no idea what this means! :-( Mick