Hi, surveying technician here, working in a surveying office that is authorized to carry out such surveys.
In our building area, the were surveyed and marked
A brief excursion into surveying technology: The formation of a parcel (simply called a property for ease) can be done in 2 ways: partitioning and subdivision.
Partitioning: Can be used for already correctly surveyed properties. This procedure takes place entirely in the office without on-site surveying. Partitioning is often used in new development areas to speed up the marketing of the properties. Afterwards, these partitioned points are officially established as boundaries: meaning that the boundaries created purely on the computer are transferred to the location with, for example, boundary stones.
Subdivision: The surveying of the properties takes place on site. The boundary points are immediately marked with, for example, boundary stones. The disadvantage is that the properties can only be transferred once the survey has been legally recorded in the land register. But it has the advantage that not 50 different parties involved (new property owners) have to be called to the boundary appointment.
(still no idea what that is supposed to be and why I should have been there??)
Since surveying is a sovereign task, such surveys may only be carried out by the cadastral office or publicly appointed surveyors. In addition, the survey is associated with an administrative act, the boundary appointment. At the boundary appointment, the parties concerned are to be given the opportunity to comment on the facts presented. Since you apparently were not at the boundary appointment, you must be informed in writing afterwards about the survey that took place and heard in writing, because the survey has affected your rights as a property owner. (Boundary markers were placed on your property).
Of course, this is much drier administrative stuff, but unfortunately necessary if someone files an objection against the administrative act within a 30-day period. Every affected person has the opportunity to file an objection against the survey if he/she believes the survey was not conducted properly. However, this happens very rarely.
For half of the building area we now have the registered owners from the land register including maiden names and who has founded a GbR, whose parents are listed in the land register instead of the "owners" etc....
This is actually regulated, as far as I know, by the surveying laws of the various federal states, that these data may be "published".
If you have further questions on the topic, feel free to get in touch.
Niels