Metres above the Adriatic ( it, Metri sopra l'Adriatico, german: Meter über Adria,

Serbo-Croatian Serbo-Croatian () – also called Serbo-Croat (), Serbo-Croat-Bosnian (SCB), Bosnian-Croatian-Serbian (BCS), and Bosnian-Croatian-Montenegrin-Serbian (BCMS) – is a South Slavic language and the primary language of Serbia, Croatia, Bosnia an ...

: ''Metara iznad Jadrana'') is the

vertical datum In geodesy, surveying, hydrography and navigation, vertical datum or altimetric datum, is a reference coordinate surface used for vertical positions, such as the elevations of Earth-bound features (terrain, bathymetry, water level, and built str ...

used in

Austria Austria, , bar, Östareich officially the Republic of Austria, is a country in the southern part of Central Europe, lying in the Eastern Alps. It is a federation of nine states, one of which is the capital, Vienna, the most populous ...

, in the former

Yugoslavia Yugoslavia (; sh-Latn-Cyrl, separator=" / ", Jugoslavija, Југославија ; sl, Jugoslavija ; mk, Југославија ;; rup, Iugoslavia; hu, Jugoszlávia; rue, label= Pannonian Rusyn, Югославия, translit=Juhoslavij ...

n states of

Slovenia Slovenia ( ; sl, Slovenija ), officially the Republic of Slovenia (Slovene: , abbr.: ''RS''), is a country in Central Europe. It is bordered by Italy to the west, Austria to the north, Hungary to the northeast, Croatia to the southeast, and ...

Croatia , image_flag = Flag of Croatia.svg , image_coat = Coat of arms of Croatia.svg , anthem = " Lijepa naša domovino"("Our Beautiful Homeland") , image_map = , map_caption = , capi ...

Bosnia-Hercegovina Bosnia and Herzegovina ( sh, / , ), abbreviated BiH () or B&H, sometimes called Bosnia–Herzegovina and often known informally as Bosnia, is a country at the crossroads of south and southeast Europe, located in the Balkans. Bosnia and H ...

Serbia Serbia (, ; Serbian: , , ), officially the Republic of Serbia ( Serbian: , , ), is a landlocked country in Southeastern and Central Europe, situated at the crossroads of the Pannonian Basin and the Balkans. It shares land borders with Hu ...

Montenegro ) , image_map = Europe-Montenegro.svg , map_caption = , image_map2 = , capital = Podgorica , coordinates = , largest_city = capital , official_languages = ...

North Macedonia North Macedonia, ; sq, Maqedonia e Veriut, (Macedonia before February 2019), officially the Republic of North Macedonia,, is a country in Southeast Europe. It gained independence in 1991 as one of the successor states of Socialist Feder ...

, as well as in

Albania Albania ( ; sq, Shqipëri or ), or , also or . officially the Republic of Albania ( sq, Republika e Shqipërisë), is a country in Southeastern Europe. It is located on the Adriatic and Ionian Seas within the Mediterranean Sea and share ...

to measure

elevation The elevation of a geographic location is its height above or below a fixed reference point, most commonly a reference geoid, a mathematical model of the Earth's sea level as an equipotential gravitational surface (see Geodetic datum § ...

, referring to the average water level of the

Adriatic Sea The Adriatic Sea () is a body of water separating the Italian Peninsula from the Balkan Peninsula. The Adriatic is the northernmost arm of the Mediterranean Sea, extending from the Strait of Otranto (where it connects to the Ionian Sea) to th ...

at the Sartorio mole in the

Port of Trieste The Free Port of Trieste is a port in the Adriatic Sea in Trieste, Italy. It's the most important commercial port of Italy with a trade volume of 62 million tonnes. It is subdivided into 5 different Free Areas, 3 of which have been allotted to ...

Gauge

The

gauging station A stream gauge, streamgage or stream gauging station is a location used by hydrologists or environmental scientists to monitor and test terrestrial bodies of water. Hydrometric measurements of water level surface elevation (" stage") and/or vol ...

in the

was established in the 1875 by the local observatory run by the military geographical institute of the

Austro-Hungarian Army The Austro-Hungarian Army (, literally "Ground Forces of the Austro-Hungarians"; , literally "Imperial and Royal Army") was the ground force of the Austro-Hungarian Dual Monarchy from 1867 to 1918. It was composed of three parts: the joint arm ...

. The average water surface elevation at Molo Sartorio became the datum valid for the whole Austro-Hungarian monarchy. Whilst the former

n states still use it, the

Eastern Bloc The Eastern Bloc, also known as the Communist Bloc and the Soviet Bloc, was the group of socialist states of Central and Eastern Europe, East Asia, Southeast Asia, Africa, and Latin America under the influence of the Soviet Union that existed du ...

successor states of Austria-Hungary like

Hungary Hungary ( hu, Magyarország ) is a landlocked country in Central Europe. Spanning of the Carpathian Basin, it is bordered by Slovakia to the north, Ukraine to the northeast, Romania to the east and southeast, Serbia to the south, Cr ...

and

Czechoslovakia , rue, Чеськословеньско, , yi, טשעכאסלאוואקיי, , common_name = Czechoslovakia , life_span = 1918–19391945–1992 , p1 = Austria-Hungary , image_p1 ...

after

World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the World War II by country, vast majority of the world's countries—including all of the great power ...

switched to the

Kronstadt Kronstadt (russian: Кроншта́дт, Kronshtadt ), also spelled Kronshtadt, Cronstadt or Kronštádt (from german: link=no, Krone for " crown" and ''Stadt'' for "city") is a Russian port city in Kronshtadtsky District of the federal city ...

Gauge of the

Baltic Sea The Baltic Sea is an arm of the Atlantic Ocean that is enclosed by Denmark, Estonia, Finland, Germany, Latvia, Lithuania, Poland, Russia, Sweden and the North and Central European Plain. The sea stretches from 53°N to 66°N latitude and from ...

, which is higher. Whilst for Austria the 1875 gauge is used as the datum, the states of former Yugoslavia use the 1900 gauge (''Nadmorska visina, m/nv''). In Albania (normal-orthometric height) they also refer to heights as 'metres above the Adriatic', but use a specific tide gauge in the port of

Durrës Durrës ( , ; sq-definite, Durrësi) is the second most populous city of the Republic of Albania and seat of Durrës County and Durrës Municipality. It is located on a flat plain along the Albanian Adriatic Sea Coast between the mouths of ...

Abbreviation

The individual countries using this datum abbreviate it in different ways depending on their local language, as follows: * Austria: ''m ü. Adria, m.ü.A.'' or ''müA'', colloquially known as ''Seehöhe'' or ''Adriahöhe'' * Hungary: ''mAf'' from ''méter Adria felett'' * Former Yugoslavian states: ''m. i. J.'' from ''Metara iznad Jadrana'' 'Metres above the Adriatic' may be abbreviated in English to m AA

Height differences between Austria and neighbouring countries

In Austria

orthometric height The orthometric height is the vertical distance ''H'' along the plumb line from a point of interest to a reference surface known as the ''geoid'', the vertical datum that approximates mean sea level. Orthometric height is one of the scientific fo ...

is used, while its neighbours use other height systems, which leads to differences. On the state borders these differences are: *

Germany Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the second most populous country in Europe after Russia, and the most populous member state of the European Union. Germany is situated betwee ...

: +25 to +34 cm, normal height according to the '' Normalhöhennull'' levelling system based on the Amsterdam Ordnance Datum *

Italy Italy ( it, Italia ), officially the Italian Republic, ) or the Republic of Italy, is a country in Southern Europe. It is located in the middle of the Mediterranean Sea, and its territory largely coincides with the homonymous geographical ...

: −0.5 to −3.2 cm, orthometric height referring to

Genoa Genoa ( ; it, Genova ; lij, Zêna ). is the capital of the Italian region of Liguria and the sixth-largest city in Italy. In 2015, 594,733 people lived within the city's administrative limits. As of the 2011 Italian census, the Province of ...

Tide Gauge *

Switzerland ). Swiss law does not designate a ''capital'' as such, but the federal parliament and government are installed in Bern, while other federal institutions, such as the federal courts, are in other cities (Bellinzona, Lausanne, Luzern, Neuchâtel ...

and

Liechtenstein Liechtenstein (), officially the Principality of Liechtenstein (german: link=no, Fürstentum Liechtenstein), is a German language, German-speaking microstate located in the Alps between Austria and Switzerland. Liechtenstein is a semi-constit ...

: −1.6 to −7.5 cm, orthometric height – ' Metres above the Sea' (''Meter über Meer'') based on the elevation of the

Pierres du Niton The Pierres du Niton (French for ''Neptune's Stones'') are two glacial erratics in Lake Geneva, Switzerland, in Geneva harbor. On the left bank of the lake near Quai Gustave-Ador, they are remnants from the last ice age, left by the Rhone glaci ...

Lake Geneva , image = Lake Geneva by Sentinel-2.jpg , caption = Satellite image , image_bathymetry = , caption_bathymetry = , location = Switzerland, France , coords = , lake_type = Glacial lak ...

at above average

Marseille Marseille ( , , ; also spelled in English as Marseilles; oc, Marselha ) is the prefecture of the French department of Bouches-du-Rhône and capital of the Provence-Alpes-Côte d'Azur region. Situated in the camargue region of southern Fra ...

Tide Gauge *

Slovakia Slovakia (; sk, Slovensko ), officially the Slovak Republic ( sk, Slovenská republika, links=no ), is a landlocked country in Central Europe. It is bordered by Poland to the north, Ukraine to the east, Hungary to the south, Austria to the ...

: +57 cm, normal height based on Kronstadt Tide Gauge *

: −8 to −12 cm, orthometric height – metres above the sea referring to Koper Tide Gauge *

Czech Republic The Czech Republic, or simply Czechia, is a landlocked country in Central Europe. Historically known as Bohemia, it is bordered by Austria to the south, Germany to the west, Poland to the northeast, and Slovakia to the southeast. The ...

: +46 to +56.3 cm, normal height based on Kronstadt Tide Gauge, and *

: +49.6 to +60.6 cm, normal height – 'Height above Sea Level' ( hu, Tengerszint feletti magasság) based on the elevation of the

Nadap Nadap is a village in Fejér county in central Hungary, with population of 460. Lying among low Velence Hills, it is the point of departure for sightseeing tours on the countryside. The obelisk in the vicinity, called "ancient mark of Nadap" serv ...

benchmark at above Kronstadt Tide Gauge. (Differences: H_Austria − H_{neighbouring states})Map with height differences
by the Austrian federal office for metrology and surveying, ''

Bundesamt für Eich- und Vermessungswesen The Federal Office of Metrology and Surveying of Austria (german: Bundesamt für Eich- und Vermessungswesen, BEV) is the body responsible for official surveying, geo-information and weights and measures (metrology) in Austria. It belongs to the ' (F ...

References

External links

*
Trieste Institute of Marine Sciences
*
Austrian Federal Office of Metrology and Surveying
{{Coord, 45.646867, N, 13.759867, E, type:landmark_region:IT-TS, display=title Vertical datums Geography of Austria Adriatic Sea Zero-level elevation points

Gauge

Abbreviation

Height differences between Austria and neighbouring countries

See also

References

External links