# Code table 3.8 - Grid point position
0 0 Grid points at triangle vertices
1 1 Grid points at centres of triangles
2 2 Grid points at midpoints of triangle sides
3 3 Grid points at shape vertices
4 4 Grid points at centre of shapes
5 5 Grid points at midpoints of shape sides
# 6-191 Reserved
# 192-254 Reserved for local use
255 255 Missing
