# Angle

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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 |