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...w=TRUE) plot(wrld_simpl, axes = TRUE, ylim = c(-90, 90), xlim=c(-180, 180), asp = 1.5, xlab="Longitude", ylab="Latitude") abline(v=-180, h=90, col="red") abline(v=180, h=-90, col="red") Can anyone help? Thanks in advance. dxc13 http://www.nabble.com/file/p23526662/TM_WORLD_BORDERS_SIMPL-0.2.RData TM_WORLD_BORDERS_SIMPL-0.2.RData http://www.nabble.com/file/p23526662/kz_time1.txt kz_time1.txt -- View this message in context: http://www.nabble.com/Overlaying-two-plots-tp23526662p23526662.html Sent from the R help mailing list archive at Nabble.com.