# FLAG TABLE 3.4, Scanning Mode
1:0:Points of first row or column scan in the +i (+x) direction
1:1:Points of first row or column scan in the -i (-x) direction
2:0:Points of first row or column scan in the -j (-y) direction
2:1:Points of first row or column scan in the +j (+y) direction
3:0:Adjacent points in i (x) direction are consecutive
3:1:Adjacent points in j (y) direction is consecutive
4:0:All rows scan in the same direction
4:1:Adjacent rows scans in the opposite direction
