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If the image above appears blurry, or you would like to see a larger image, please view the full-sized image of the RLR diagram.
Add 2.138m to data values 1938-1953 to refer to RLR
Add 6.859m to data values 1959-1962 to refer to RLR
Add 2.138m to data values 1963 onwards to refer to RLR
RLR is 11.905m below primary benchmark IGN N.CP-15