Angle

This article is a stub.

The angle from the horizontal plane. For lines or directions, 0 means flat across the horizontal plane, a positive value means the angle directs up, and negative angle directs down. For inclines, 0 means a perfectly flat surface, and the higher the angle the steeper the surface.

Value	Cardinal direction
0°	Flat on the horizontal plane
90°	Straight up, perpendicular to the horizontal plane
-90°	Straight down, perpendicular to the horizontal plane