[R] error in map library

Dear Ruser, I am trying to use the map library. But unfortunately I am facing the warning message above: Warning message: *In readGDAL(destfile, silent = TRUE) : GeoTransform values not available * I want to use that library because I intend to plot some station in a Brazilian map.

[R] error in map library

Dear Ruser, I am trying to use the map library. But unfortunately I am facing the warning message above: Warning message: *In readGDAL(destfile, silent = TRUE) : GeoTransform values not available * I want to use that library because I intend to plot some station in a Brazilian map. I