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.

Nullable<double> CoordinateX { get; set; }

Property CoordinateX As Nullable(Of Double)
	Get
	Set

property Nullable<double> CoordinateX {
	Nullable<double> get ();
	void set (Nullable<double> value);
}

abstract CoordinateX : Nullable<float> with get, set