MAP\XY_MAP [Filename] /TYPE LMV|VLM|...
By default, XY_MAP produces an LMV cube. This can be overridden by the
option /TYPE to reorder the dimensions as desired. All permutations are
supported. In particular, VLM is the natural ordering of the internal
buffers (i.e. it should be faster to create the cube in this order), and
it should also speed up cube reading when it is accessed by frequency
slices.