The tolerance of boundary stones

Landmarks sometimes play a crucial role in the use of the property. If construction is to be carried out close to the border and a boundary stone found does not quite correspond to the coordinates of the real estate cadastre, this may be due to a certain tolerance in the setting.

What is the tolerance of boundary stone locations?

The division of land and land in our country is sovereignly set in the real estate cadastre. The division consists of a network of boundary points, which are usually marked with a boundary stone on site, i.e. they are marked off. Originally the limits of the definition of salvely peace areas, today they are only there for fixing private and public ownership areas.

  • Also read - if a landmark can not be found
  • Also read - may you put a landmark?
  • Also read - is it allowed to remove a landmark?

If you want to detect the exact boundary between your and a neighboring property or a public area - for example, to realize a construction project - you must therefore stick to the cadastral borderline. In case of doubt - when it comes to centimeters - you can request an official borderline information from the local surveying authority. Here you can get the exact coordinates of designed border points and can locate themselves on the ground on the ground.

Occasionally, however, it can happen that the boundary stone and the coordinate do not completely coincide with each other. This can be due to the following reasons:

  • historically determined tolerance area
  • topographically determined tolerance area

The causes of tolerances

Basically, the cadastral geodata of boundary stones are subject to the criterion "highest accuracy". This means setting the limit coordinate of a limit point as precisely as possible to the millimeter. In practice, however, the boundary stones are usually set with an "average positional accuracy" of a few centimeters.

History of the boundary stone

The real estate cadastre is also based on an archive of coordinates that has grown over two centuries. The geodata of officially marked boundary stones can therefore be older and more recent. This results in a certain tolerance area, which usually does not allow more than one meter of offset between the virtual boundary point and the actual boundary stone.

Difficult situation

In topographically difficult conditions, this tolerance area can also come into play, i.e. when the terrain and usage conditions do not allow boundary stones to be set directly at the coordinate position. Water bodies or buildings can make such a topographically determined deviation of the boundary stone position necessary. In such a case, one speaks of an indirect or indirect marking, which functions only as a pointer to the actual limit point.