How is the direction of a boundary line measured?

The direction of a boundary line is measured using bearing. Bearing is a method that describes the angle between a line and a reference direction, typically north or south. It indicates both the angle from the reference direction and whether the angle is measured east or west. This system is essential in surveying and mapping to accurately describe property lines and boundaries.

In contrast, elevation refers to the height above a specific reference point, often sea level, but it does not provide information about the direction of a boundary line. Distance pertains to the length of the boundary line but does not specify its directional orientation. Span may refer to the extent of something but is not a recognized measurement for boundary lines in surveying. Therefore, bearing is the precise term used to define how a boundary line is oriented relative to standard directional references.