 Hi list,
when I run the code     

map1 <- map("county",c("montana"), fill=T, plot=F)
I see that  R has 57 counties stored for Montana, USA. It shows separate counties "montana.yellowstone"   and  "montana.yellowstone national" in there.
However, in fact,  Montana has only 56 counties. Has any one encountered this problem before? How to solve this?
Milan

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