Revised Local Reference (RLR) Diagram for HEL

Station ID: 146

RLR diagram based on the information in the datum section below

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Datum information

Add 3.295m to data values 1901-1915 to refer to RLR (1938)
Add 5.31m to data values 1931-1938 to refer to RLR (1938)
Add 1.947m to data 1965 onwards to refer to RLR (1938)
RLR (1938) is 10.2m below BM Church