ETCOGODirectionUnits

COGO Direction Types and Direction Units

All ET COGO tools use four different direction types and four different direction units. The user can set the direction type and direction units on the Add Course tab of the ET Traverse dialog.

Direction Types:

	Polar - angles are measured counterclockwise starting from East
	North Azimuth - angles are measured clockwise starting from North
	South Azimuth - angles are measured clockwise starting from South
	Quadrant Bearing - angles are measured starting from either from South or from North toward East or West. For example S 33 E defines an angle of 33 degrees from South toward East.

Direction Units:

Decimal Degrees (One degree is equal to 1/360 of a circle)
Degrees Minutes Seconds ( Same as above but the fractions are measured in Minutes - 1/60 of a degree and Seconds - 1/3600 of a degree)
Radians (2Pi radians make a full circle)
Gradians (One gradian is equal to 1/400 of a circle)
Gon - Gons - used in some European countries (One gon is equal to 1/400 of a circle)

A combination of any Direction Type and any Direction Unit can be used with ET COGO tools