Flags 8: Scanning mode
Code tables
| Bit | Value | Meaning |
| 1 | 0 | Points scan in +i direction |
| 1 | 1 | Points scan in -i direction |
| 2 | 0 | Points scan in -j direction |
| 2 | 1 | Points scan in +j direction |
| 3 | 0 | Adjacent points in i direction are consecutive |
| 3 | 1 | Adjacent points in j direction are consecutive |
( 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