## Not run:
# library(oce)
# data(coastlineWorld)
# longitude <- coastlineWorld[['longitude']]
# latitude <- coastlineWorld[['latitude']]
# mapPlot(longitude, latitude, type='l', grid=5,
# longitudelim=c(-70,-50), latitudelim=c(45,50),
# projection="+proj=merc")
# lon <- -63.5744 # Halifax
# lat <- 44.6479
# mapPoints(lon, lat, pch=20, col="red")
# mapText(lon, lat, "Halifax", col="red", pos=1, offset=1)
# ## End(Not run)
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