map.f: Wrapper for the PBSmapping plotMap function
In duplisea/ddhelper: Helper functions used by Daniel Duplisea

Make a map using PBSmapping

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map.f(longs = c(-74, -50), lats = c(43, 52.25),
  land.colour = "sienna3", sea.colour = "lightblue", bathy = T,
  isob = c(100, 200))

`longs`	longitude decimal degrees (- for western hemisphere)
`lats`	latitude decimal degrees (- for southern hemisphere)
`bathy`	do you want to show bathymetric lines. Default = T
`isob`	the depth of the isobaths you want to show
`land.col`	colour of the land
`sea.col`	colour of the oceans and water bodies