UV_MAP

        [CLEAN\]UV_MAP [CenterX CenterY Unit] [ANGLE AngleValue] [/FIELDS Field-
    List]  [/TRUNCATE Fraction] [/RANGE Min Max Type] [/CONTINUUM [Naver]] [/IN-
    DEX Alpha]

    Compute a dirty map and beam from a UV data. UV data must have  been  loaded
    from a UV table by command "READ UV File". UV_MAP processes single fields as
    well as Mosaics.

    The  user can control the algorithm through SIC variables. New values can be
    given using "LET VARIABLE value". For ease of use, and whenever it is possi-
    ble, a sensible value of each parameter will automatically be computed  from
    the context if the value of the corresponding variable is set to its default
    value,  i.e. zero value and empty string. A few variables are initialized to
    "reasonable" values.

    The arguments define the Map center  and  orientation  (Projection  system).
    Unit  can  be any of DEGREE, MINUTE, SECOND and RADIAN, or ABSOLUTE.  In the
    latter case, CenterX should be the Right Ascension and CenterY the  Declina-
    tion  in  sexagesimal notation. Otherwise, they are offsets from the current
    projection center in the specified Unit.

    AngleValue is the ** absolute ** rotation of the  projection  (counted  East
    from  North as usual), which means the angle between the Celestial North and
    the Y axis in the resulting image.

    If no argument is given, UV_MAP uses the variable MAP_CENTER to  derive  the
    projection system. If it is empty, it does not change it.

        [CLEAN\]UV_MAP ?
    Will list all MAP_* variables controlling the UV_MAP parameters