12-692: The Ellerspring , at 657.5 m above sea level (NHN) , is the highest point of the Soonwald , a part of the Hunsrück mountains in the German Central Uplands . It is situated near Winterbach in the county of Bad Kreuznach in the state of Rhineland-Palatinate The Ellerspring lies in the northwest of the county of Bad Kreuznach roughly in the centre of the Soonwald-Nahe Nature Park . It rises within
24-478: Is a theoretical reference plane. It is derived by deducting normal heights from the normal plumb line . The difference between the resulting quasi-geoid and the reference ellipsoid is called the height anomaly or quasi-geoid height. Since 1 January 2000 the whole of Germany has changed its height system over to normal heights based on the datum of the Amsterdam Ordnance Datum , known as
36-704: The Amsterdam Ordnance Datum and transferred to the New Berlin Observatory in order to define the Normalhöhenpunkt 1879 . Normalnull has been defined as a level going through an imaginary point 37.000 m below Normalhöhenpunkt 1879 . When the New Berlin Observatory was demolished in 1912 the reference point was moved east to the village of Hoppegarten (now part of the town of Müncheberg , Brandenburg , Germany ). This cartography or mapping term article
48-645: The 1932 German Mean Height Reference System ( Deutsches Haupthöhennetz ). The plane is in the shape of a quasi- geoid . The reference height is a geodetic , fixed point on the New Church of St. Alexander at Wallenhorst in the German state of Lower Saxony . The geopotential height of this point was calculated in 1986 as part of the United European Levelling Network (UELN), based on the Amsterdam Ordnance Datum . The NHN plane
60-719: The German Mean Height Reference System, DHHN92. At the same time, the new NHN is the basis of the United European Levelling Net (UELN), formerly known as the Reseau Européen Unifié de Nivellement or REUN , which standardises the height systems of the European countries. Heights in this system are given in meters above NHN or m (NHN) . The NHN was introduced because for heights above Normalnull
72-626: The actual gravitational field of the Earth was not taken into account. As a result, there were changes in both the old West German normal orthometric heights (new methods of calculation) and the normal heights of East Germany (with respect to the Amsterdam Datum). The elevations differed — depending on location — by 0.06 to 0.16 m. As a result of new measurements as part of the changeover, however, variations of 0.59 m ( Zugspitze ) have surfaced. Older relief maps often show heights above
84-580: The mountain is named. Roughly northeast of the summit is the Ödesborner Höhe (641.1 m) and, beyond that, the Hölzenkopf (604.8 m). Forming a spur to the south-southeastern is the Odstein (511.0 m) and, to the east, the Steineberg (563.9 m). The Ellerspring belongs to the natural regional major unit group of Hunsrück (No. 24), in the major unit of Soonwald (240) and
96-481: The northwest) and Sargenroth and Mengerschied (to the west). Not far from the mountain, in the county of Bad Kreuznach, lie the villages of Spabrücken and Münchwald (to the east), Gebroth (to the southeast) and Winterbach and Ippenschied (to the south-southeast). About 2 km ( as the crow flies ) south-southwest of the summit at a height of about 529 m rises the Nahe tributary of Ellerbach , after which
108-755: The old reference planes. Current maps by the federal survey authorities are based on NHN. At the beginning of 2013 most of the federal states (except Berlin, Thuringia and Saxony-Anhalt) had complete coverage by the new digital topographic mapping at 1:25,000 scale (DTK). Not all the maps have appeared in print yet. On the DTK25 maps, NHN is used for elevations; however, on the DTK25-V scanned topographic maps Höhennull (HN) and Normalnull (NN) are still being used. In East Germany normal heights used to be referred to as heights above Höhennormal or HN . The 1958 Kronstadt Tide Gauge ( Kronstädter Pegel )
120-554: The parish of Winterbach , whose village church stands some 4.6 km south-southeast of the summit. About 1 km to the northwest of the summit in the valley of the Gräfenbach , which initially flows southwest, and that of the Lametbach , which begins by heading northeast, is the boundary with the county of Rhein-Hunsrück-Kreis , in which are located the villages of Argenthal (to the north), Riesweiler and Tiefenbach (to
132-487: The sub-unit of Großer Soon (240.1) to the eponymous natural region of Großer Soon (240.11). Normalh%C3%B6hennull Normalhöhennull ( German pronunciation: [nɔʁmaːlˈhøːənˌnʊl] , "standard elevation zero") or NHN is a vertical datum used in Germany. In geographical terms, NHN is the reference plane for the normal height of a topographical eminence height above mean sea level used in
SECTION 10
#1732780915987144-575: Was used as the datum. The new NHN heights are typically 12–15 cm higher. The maximum deviations in the spirit level points of first order are between 7 and 16 cm. Normalnull Normalnull ("standard zero") or Normal-Null (short N. N. or NN ) is an outdated official vertical datum used in Germany. Elevations using this reference system were to be marked Meter über Normal-Null (“meters above standard zero”). Normalnull has been replaced by Normalhöhennull (NHN). In 1878 reference heights were taken from
#986013