Using very large and local coordinates at the same time

Importing files with large coordinates

If you use files with coordinates in the Gauss-Krüger or UTM coordinate system (which need to be imported using offsets) and files with local coordinates (which can be imported without offsets) at the same time, the following approach is useful:

The UTM system is a global coordinate system that divides the surface of Earth between 80°S and 84°N latitude into 60 zones, each 6° of longitude in width. These individual zones are covered with a two-dimensional Cartesian coordinate system.

UTM is a worldwide standard that is used for surveying, GPS navigation, conventional maps and Google Earth/Maps. The UTM coordinate system has already replaced various national coordinate systems like the Gauss-Krüger system in Germany or the Swissgrid in Switzerland.

Allplan handles UTM, Gauss-Krüger and Swissgrid in the same way, that is as offset coordinates. In Allplan it is not necessary and thus not possible to convert UTM coordinates to other coordinate systems such as Gauss-Krüger or Swissgrid. So the same coordinate system is used for import and export.

1. Specify the appropriate GK or UTM coordinate offsets in the project's properties.
2. Import the GK or UTM files, e.g. a site plan (the offset is applied).
3. Deactivate the offset in the project's properties. (However, the values themselves must be retained.)
4. Import the files with the local coordinates.
5. Work while the offset is deactivated.

   Note: Prior to exporting the contents of your document, you have to activate the offset again in the project's properties so that the original GK coordinates are transferred to your data exchange partner, for example.