| Bit No. | Value | Meaning |
| 1 | 0 | Points scan in +i direction |
| 1 | Points scan in -i direction | |
| 2 | 0 | Points scan in -j direction |
| 1 | Points scan in +j direction | |
| 3 | 0 | Adjacent points in i direction are consecutive |
| 1 | Adjacent points in j direction are consecutive | |
| 4-8 | 0 | Reserved |