// DefaultPrimeMeridian.GREENWICH;
final GeodeticDatum datum;
datum = datumFactory.createGeodeticDatum(name("Airy1830"), airy1830, greenwich);
out.println();
out.println("create Coodinate Reference System....4: ");
out.println(datum.toWKT());
// NOTE: we could use the following pre-defined constant instead:
// DefaultEllipsoidalCS.GEODETIC_2D;
final EllipsoidalCS ellCS;
ellCS = csFactory.createEllipsoidalCS(name("Ellipsoidal"),