GRIB2 - TABLE 3.4
SCANNING MODE

Section 3, Octet 72 - for grid templates 0-3 and 40-43 Section 3, Octet 60 - for grid templates 10, 30, and 31 Section 3, Octet 65 - for grid template 20 Section 3, Octet 66 - for grid template 90 Section 3, Octet 57 - for grid template 110 Section 3, Octet 39 - for grid template 120 Section 3, Octet 51 - for grid templates 1000 and 1100 (Does not apply to grid templates 50-53, 100, and 1200)

Created 05/11/05

Bit Number | Value | Meaning
1 | 0 | Points in the first row or column scan in the +i (+x) direction
1 | Points in the first row or column scan in the -i (-x) direction
2 | 0 | Points in the first row or column scan in the -j (-y) direction
1 | Points in the first row or column scan in the +j (+y) direction
3 | 0 | Adjacent points in the i (x) direction are consecutive
1 | Adjacent points in the j (y) direction are consecutive
4 | 0 | All rows scan in the same direction
1 | Adjacent rows scan in the opposite direction
5-8 |  | Reserved

Notes: 1. i direction - west to east along a parallel or left to right along an x-axis. 2. j direction - south to north along a meridian, or bottom to top along a y-axis. 3. If bit number 4 is set, the first row scan is defined by previous flags.

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