That function does not seem to exist in Splus 6.1.2 release 2 for Linux. Could it be that it's written by someone locally, or it was in some add-on module?
Its part of the 'maps' library. Ray Brownrigg has ported it to R, but looking at the DESCRIPTION file tells me this:
Description: Display of maps. The projection code found in the original
S code is not included because of unclear licensing issues (and
that code didn't work straight off anyway :-)).If the original poster is feeling brave, my Rmap library will do map projections using the PROJ4 library (so you'll have to install that first). Its in a very early state, and the current version wont read that format of map file (thing.G, thing.L, thing.N files) if thats what is being used.
But it might be that all is needed is a project(xy) function, which my code does as a simple (~5 line) wrapper to the PROJ4 library.
Here: http://www.maths.lancs.ac.uk/Software/Rmap/
But be warned, its very very fragile and I cant help you if it fails.
Baz
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