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- tagra ordanáis Amstardam Reference Faomhadh an téarma seo mar chuid de Thionscadal Lex
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- sea level | Amsterdam Ordnance Datum | Amsterdam water | Amsterdam gauge | Amsterdam mark
- en
- Definition vertical datum in use in large parts of Western Europe Reference "Wikipedia > Normaal Amsterdams Peil, http://en.wikipedia.org/wiki/Normaal_Amsterdams_Peil (27.7.2009)"
- Comment Originally the zero level was the average summer flood water level (not mean sea level) in the IJ in the centre of Amsterdam, then still connected with the open sea, in 1684. Currently it is physically realised by a bench mark in brass in the centre of Amsterdam, which is a popular tourist attraction.