Normal high point 1912

Coordinates: 52 ° 29 ′ 6 ″  N , 13 ° 59 ′ 44.9 ″  E The normal altitude point 1912 (NHP 1912) was the starting point for precise altitude measurements in Germany and is still one of the date points for the current German main altitude network in 2016 and was the only one Date point for the former German Main Elevation Network 1912 (DHHN12). The point consists of a group of special height control points that were introduced as an underground definition (UF).

Historical development

The imminent demolition of the Berlin observatory and with it the loss of the fundamental point for height measurements posed the question of whether, where and how a replacement for the normal altitude point of 1879 could be created for the trigonometric department of the Reich Office for Land Survey around 1910 .

After careful examination and drilling to a depth of 20 m in the vicinity of the planned point location in Hoppegarten , a district of Müncheberg , Brandenburg since 2002 , five UFs were brought in in April 1912, spread over a distance of 6 km. The middle one is the actual new normal high point in 1912, the other four serve as control points.

In 1932, a further UF was introduced at some distance north and south of the three middle definitions, in order to maintain the normal height point in any case, even if the road should be upgraded. Since then, the entire group has consisted of eleven underground height control points (five original + 2 x 3 subsequent ones).

Web links

• Helmut Sadowski, Bernd Sorge: The normal high point of 1912 - date point of the DHHN 2012? In: Measurement Brandenburg , 2/2005, pp. 31–39. (PDF; 1.5 MB) Accessed August 11, 2020 . 
• Geoinformatics

Individual evidence

1. ↑ Martina Sacher, Gunter Liebsch: The German height system and its realization in DHHN2016, In: The renewal of the German main height network and the uniform integrated geodetic spatial reference 2016. 2018, p. 25 ,. (PDF) Accessed August 11, 2020 .