MAP_SIZE

      MAP_SIZE[2]      Integer

    Number of pixels in X and Y. It should preferentially be  a  power  of  two,
    (although   this   is   not   strictly   required)   to  speed-up  the  FFT.
    MAP_SIZE*MAP_CELL should be at least twice the  size  of  the  field-of-view
    (primary  beam size for a single field). Enter 0,0 to let the command find a
    sensible map size.

    MAP_SIZE is not used if MAP_FIELD is non zero.

    Odd values are forbidden.

    Default is 0,0, i.e. UV_MAP will guess the most appropriate values which de-
    pend on MAP_ROUNDING and MAP_POWER.