# Code table 6.0 - Bit map indicator
0 0 A bit map applies to this product and is specified in this Section 
1 1  A bit map pre-determined by the originating/generating centre applies to this product and is not specified in this Section
# 1-253 A bit map predetermined by the originating/generating centre applies to this product and is not specified in this Section 
254 254 A bit map defined previously in the same GRIB message applies to this product 
255 255 A bit map does not apply to this product