Genoa level

The Genoa gauge is the basis of the official reference level in Italy . The Genoese gauge station, which has been continuously measuring since the middle of the 19th century and whose mareographer is located in a gauge house at the port, represents the mean water of the Ligurian Sea . The altitude information differs from the reference level Marseille level valid for France and from the reference level Molo Sartorio , the was defined for Austria-Hungary . The differences in the height systems along the national borders are around 20 cm, but the difference to the Amsterdam Level (NAP) , which is almost 1000 km away, is up to 50 cm.

Mareographer in Genoa

The current Mareograf is run by the Institute for Environmental Protection and Research ( Istituto Superiore per la Protezione e la Ricerca Ambientale , ISPRA) of the Italian Ministry of the Environment .

Since the establishment of the zero point, the indication of the Genoa level has in principle been independent of fluctuations in the water level . Only the word level in the name reminds of the dependence on a water level .