Not defined in Darwin Core. East-west value of the coordinate. The properties CoordinateX, CoordinateY, CoordinateZ, CoordinateM and CoordinateSystemWkt defines where the species observation was made. Which values that are valid depends on which coordinate system that is used.

public double CoordinateX { get; set; }

Public Property CoordinateX As Double
	Get
	Set

public:
property double CoordinateX {
	double get ();
	void set (double value);
}

member CoordinateX : float with get, set