/**
  * Optional coordinate system that allows a document to be authored
  * to display values in a coordinate system other than that associated
  * with the source data. For example, a map may be created in a state
  * plane coordinate system based on a 1927 datum, but it is possible
  * to display its latitude and longitude values in the WGS84 datum
  * corresponding to values reported by a GPS device.
  *
  * @param cs
  */
 virtual public void SetDisplayCoordinateSystem(GeographicCoordinateSystem cs)
 {
     base.Put(PdfName.DCS, cs);
 }
 /**
  * Optional coordinate system that allows a document to be authored
  * to display values in a coordinate system other than that associated
  * with the source data. For example, a map may be created in a state
  * plane coordinate system based on a 1927 datum, but it is possible
  * to display its latitude and longitude values in the WGS84 datum
  * corresponding to values reported by a GPS device.
  *
  * @param cs
  */
 virtual public void SetDisplayCoordinateSystem(GeographicCoordinateSystem cs) {
     base.Put(PdfName.DCS, cs);
 }