Di Peegel faan Amsterdam (Normaal Amsterdams Peil, kurt NAP) as uun 17. juarhunert faan't stääd Amsterdam fäästlaanj wurden, am en nulponkt för a siapeegel tu saaten. Hi racht ham efter a madelst weederstant faan a Nuurdsia an täält uun a hialer Neederlunen. Uun Sjiisklun het di ponkt Normalhöhennull (NHN of uk MSP).
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