Location status
The situation status (LST) is used in official surveying in Germany ( land surveying and real estate cadastre ) to differentiate between different position coordinates of a point . The position status identifies the type of coordinates and indicates the geodetic reference system to which the coordinates relate. If several pairs of position coordinates are kept for the same survey point, they will receive different position status information.
In the official real estate cadastre information system (ALKIS) and in the official fixed point information system (AFIS) , which have been introduced since 2009, the situation status is no longer [out of date] . Coordinate systems are differentiated by specifying the reference systems (e.g. position or height reference system). The information about the type of coordinates previously contained in the position status is saved in other attributes.
meaning
Since the end of the 19th century, triangulations have been used in the individual countries of the German Empire to create different network bases for land registration. In Prussia this was the network of the Prussian Land Registration . Later network renewals, most recently through satellite geodetic methods , added further network principles.
In order to differentiate between the different coordinates of a point, the position status was introduced. This ensures that only coordinates that refer to a reference system are used in geodetic calculations. It is also possible to mark the old coordinates as historical coordinates when recalculating coordinates.
Encryption
The situation is encoded with a three-digit combination of numbers and letters. The first position indicates the type of coordinates and the other two positions as a reference system.
Possible types of coordinates are, for example, preliminary coordinates (0), fixed coordinates in the GK system (1), fixed UTM coordinates (4) or historical coordinates (9, A – Z). Frequent reference systems are the ETRS 89 (.89) or the Prussian Land Recording (.01). For example, the situation status 001 indicates provisional coordinates of the Prussian land survey or the situation status 489 indicates fixed UTM coordinates in ETRS 89.
The type of encryption is regulated in the surveying regulations of the federal states. Since there are different network bases in each federal state, there are differences between the federal states, especially with regard to the reference system. In the future, ETRS 89 is to be introduced in Germany as a uniform network basis and thus converted to the uniform situation status 489.
Height and position status
Similar to the position status, different heights are distinguished by the height status . Three-dimensional geocentric Cartesian coordinates are given a position status , e.g. B. 389 for XYZ coordinates in ETRS 89.