At that point, a major compass direction was chosen (North, South, East, or West) that was most perpendicular to the direction of the edge between the top and outslope.
(a major compass direction; was chosen; T:At that point) Context(a major compass direction was chosen,List([15, 51))):(a major compass direction; was chosen was; most perpendicular to the direction of the edge between the top and outslope)
a major compass direction was chosen,List([15, 51))
a major compass direction a major compass direction
was chosen was chosen was
T:At that point
most perpendicular to the direction of the edge between the top and outslope