Working group of the surveying administrations of the federal states of the Federal Republic of Germany

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In the working group of the surveying administrations of the federal states of the Federal Republic of Germany ( AdV ), the specialist administrations of the federal states responsible for land surveying and the real estate cadastre , as well as the federal administrations concerned, work together to deal with technical matters of fundamental and supraregional importance and thus to ensure a high degree of national uniformity to care.


The working group develops recommendations and drafts for binding regulations for a uniform procedure for the creation, maintenance and further development of the geodetic bases, the topographical land survey , the official topographical-cartographical information system, the topographical national map series and the real estate cadastre .

Under the direction of the working group, the member administrations carry out transnational projects and work together on the development and application of technical processes.

The working group comments on draft laws and advises on specialist issues in organizational, personnel, training and auditing as well as cost and usage law matters.

The working group works with related organizations and with institutions involved in geodetic research and teaching. She represents the official German land surveying in the European Union and in international institutions. It works with other countries and participates in development aid.


The working group was founded in 1948 after it became clear that land surveying and real estate cadastre - in accordance with federalism - fall within the competence of the states . Until then the development had led in the opposite direction, to centralization (in the Reichsamt für Landesaufnahme ), and a central coordination of the work in these areas was and is still necessary.

In 1966 a decision was made with regard to the Gauß-Krüger coordinate system that the originally 3 ° wide meridian strips should have an extension of 1 ° 40 'on both sides instead of 1 ° 30' so that two neighboring systems with a length of 20 minutes (on average cover about 23 km) wide strips. In this overlap zone, the coordinates in the respective meridian strip and the coordinates of the neighboring meridian strip are specified for each point. This means that geodetic measurements and calculations are possible to a certain extent beyond the edge of the meridian strip without having to change the strip.

In 1991, the introduction of was ETRS89 which the WGS84 - date corresponds decided as a uniform official position reference system for the whole of Germany. Furthermore, the AdV decided in 1995 to introduce the UTM coordinate system in connection with the ETRS89 datum across the board. This means that all surveying administrations in Germany are now obliged to also transfer the real estate cadastre to the UTM / ETRS89. Initially, the state survey offices made the transition to the UTM system in the 1990s. In mid-2015, Saxony was one of the last federal states where the changeover was carried out.


Members of the working group are the highest authorities of the federal states responsible for surveying and geospatial information, as well as the Federal Ministry of the Interior , the Federal Ministry of Defense and the Federal Ministry of Transport and Digital Infrastructure .

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Individual evidence