Code table 6.0 - Bit Map Indicator

      Code
      figure
      Meaning
      0A bit map applies to this product and is specified in this Section
      1-253A bit map pre-determined by the originating/generating center applies to this product and is not specified in this Section
      254A bit map defined previously in the same "GRIB" message applies to this product
      255A bit map does not apply to this product