Please note: In many cases, the station position in our database is accurate
to only one minute. Thus, the tide gauge may not appear to be on the coast.
Primary benchmark for Les Sables d'Olonne is now IGN O.HI - 65 7.756m above Zero Hydrographique.
Documentation added 2014-10-01
Using data from SONEL the latitude and longitude for Les Sables D'Olonne has been revised.
Documentation added 2016-06-29
When the data were downloaded from SONEL it was found that there were a number of revisions to the dataset. Because of this the complete dataset was re-loaded.