internal override void SetXML(XmlElement xml, BaseClassIfc host, HashSet<int> processed)
{
base.SetXML(xml, host, processed);
setAttribute(xml, "MapProjection", MapProjection);
setAttribute(xml, "MapZone", MapZone);
if (mMapUnit > 0)
xml.AppendChild(MapUnit.GetXML(xml.OwnerDocument, "MapUnit", this, processed));
}