Dear Rusers,
  I'm useing spatial package to get a rectangular, but the map seems to be
wrong,and it maybe need to adjust some parameters that i don't know.

My pograms:
library(spatial)
ppregion(xl=-8.75,xu=133.45,yl=-15.15,yu=187.05)
poly<-ppgetregion()
polymap(poly)
#the programs goes correctly, but the map seems not very good. Please paste
the programs in your R, then you'll see the problems.
BTW, i have a points dataset with no corresponding polygon, so i  want to
generate a polygon. About this operation, is there any good method to do?
Thanks very much! any suggestions are great welcome!

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