Last updated: January 2013
The following table lists the GRIB2 meta data and associated grib_api keys for the Bit Map Section of GRIB2 messages.
Octets | Key Name | Comments | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
1-4 | section6Length | Length of section in octets (nn) | ||||||||
5 | numberOfSection | Number of section (6) | ||||||||
6 | bitMapIndicator | Bit-map indicator according to Code Table 6.0
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7-nn | Bit-map: Contiguous bits with a bit to data point correspondence, ordered as defined in Section 3. A bit set equal to 1 implies the presence of a data value at the corresponding data point, whereas a value of 0 implies the absence of such a value. |
Note: If octet 6 is not zero, the length of the Section is 6 and octets 7-nn are not present.