Heading()

Summary

Returns the azimuth of the AB or BA direction of a line.

 

Changes

Added to Version 2014.

 

Syntax

Heading(int id, array options)

 

Argument	Contents
id	The integer ID of the line

 

Option	Type	Contents
Direction	String	"AB" (the default) or "BA"
Position	String	"End to End" (the default), "A Node" or "B Node"
Threshold	Real	The distance from the node to the next shape point

 

Returns

A real number indicating the azimuth in degrees, from 0 (due north) to 360 (measured clockwise).

 

Notes

• The Position option specifies whether you want the heading at one end of the link based on shape points near the A or B node, or "End to End" (the default) to calculate the azimuth based on the endpoints.

• The Threshold option can be used when the Position option is "A Node" or "B Node." The heading will be computed between the coordinate of the node and that of the first shape point that is a minimum distance, determined by the Threshold value, from the node.

 

See Also

Function	Summary
Azimuth()	Computes the azimuth (heading) for a line between two points
GetDistance()	Computes the great circle distance between two coordinates