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