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Data collected independently and is not regarded as official. The data is measured in meters at each of the indicated locations on the date shown.  Use the filter, group or sort function to view sets of data. For example by location. You can also download the data as a comma separated value (CSV) file.

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ODN = Ordanance Datum Newlyn refers to the height (in M) above mean sea level measured to a reference point in Newlyn, Cornwall.