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        [GREG2\]RGMAP /BLANKING Bval Eval

    Override the current blanking value as defined by command  SET BLANKING.
    Contours  are  not  drawn in pixels touching pixels with value V so that
    ABS(V-Bval) <= Eval. This is extremely useful  for  regular  grids  only
    partially filled as often occur in astronomy.

Gildas manager 2021-01-19