///<summary>
/// Returns this Geometrys bounding box.
///</summary>
///<remarks>If this Geometry is the empty geometry, returns an empty Point.
/// If the Geometry is a point, returns a non-empty Point. Otherwise, returns a Polygon whose
/// points are (minx, miny), (maxx, miny), (maxx, maxy), (minx, maxy), (minx, miny).</remarks>
///<returns>
///Returns an empty Point (for empty Geometrys), a Point (for Points) or a Polygon
///(in all other cases)
///</returns>
public virtual Geometry GetEnvelope()
{
return GeometryFactory.ToGeometry( GetEnvelopeInternal(), _precisionModel, _SRID );
} // public Geometry Envelope()
