*/
private static HierarchicalMapTypeControl getHierarchicalMapTypeControl() {
if (hControl != null) {
return hControl;
}
hControl = new HierarchicalMapTypeControl();
hControl.addRelationship(MapType.getNormalMap(),
MapType.getMarsVisibleMap(), "Mars visible");
hControl.addRelationship(MapType.getNormalMap(),
MapType.getMarsInfraredMap(), "Mars infrared");
hControl.addRelationship(MapType.getNormalMap(),