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        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 VLM.

    VLM  is  the  natural  ordering  of the XY_MAP internal buffers, i.e. it
    should be faster to create the cube in this order. VLM  cubes  are  also
    useful  when  data  has to be accessed by spectrum (e.g. to use the cube
    with FILE IN mycube.vlm), as opposed to the LMV cubes  which  are  effi-
    cient for access by channel/plane.

Gildas manager 2018-11-19