File: Class-CRS.R

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# Copyright (c) 2003-7 by Barry Rowlingson and Roger Bivand

setClass("CRS", representation(projargs = "character"),
    		prototype = list(projargs = character(1)),
                validity = function(object) {
                  if (length(object@projargs) != 1)
                    return("projargs must be of length 1")
})