=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-Jun-1991 Kungsholmsfort 050/081 RLR(1964) is 8.0m below BM404M =========================== FOLLOWING PSMSL DOCUMENTATION ADDED 19-Oct-1994 data for 1987-90 revised in October 1994 =========================== FOLLOWING PSMSL DOCUMENTATION ADDED 19-May-2010 Data for 1937-2008 given to 220cm below Swedish Height System 1900 (RH00)Data for 2009 onward given to local datum 898.6cm below RH00 =========================== FOLLOWING PSMSL DOCUMENTATION ADDED 09-Jun-2010 Beacause of the change in reference datum the RLR value is now -2000mm.