Horizontal Coordinate System Definition, Planar
The following elements comprise the Horizontal Coordinate System, Planar Definition:
	One of the following:
		Map Projection, mandatory the systematic representation of all or part of the surface of the Earth on a plane or developable surface.
	or
		Grid Coordinate System, mandatory a plane-rectangular coordinate system usually based on, and mathematically adjusted to, a map projection so that geographic positions can be readily transformed to and from plane coordinates.
	or
		Distance and Bearing Representation, mandatory a method of encoding the position of a point by measuring its distance and direction (azimuth angle) from another point.
	Planar Distance Units, mandatory
	Planar Coordinate Encoding Method, mandatory the means used to represent horizontal positions.
	One of the following:
		Coordinate Representation, mandatory the method of encoding the position of a point by measuring its distance from perpendicular reference axes (the "coordinate pair" and "row and column" methods).
	or
		Distance and Bearing Representation, mandatory a method of encoding the position of a point by measuring its distance and direction (azimuth angle) from another point.
	Planar Distance Units, mandatory units of measure used for distances.
Click the Image for Examples