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DHM25

Digital height model DHM25 is a set of data representing the 3D form of the earth’s surface without vegetation and buildings. It is essentially based on the 1:25,000 Swiss national map.

dhm25

The digital height model of Switzerland

DHM25 can be used wherever computations of the topography of the earth’s surface are required. In other words, it is a basic dataset for geographic information systems. For example, it can be used for making calculations of terrain sections, simulating avalanches, constructing terrain models, carrying out visibility studies, planning telecommunication antennas or visualisations of landscapes. The range of potential uses is very broad.

Terms of use

Additional information

Technical details

Available models

Basis Model (left) and Matrix Model (right) of DHM25
Basis Model (left) and Matrix Model (right) of DHM25

DHM25 - Basis Model

Digitised height data of the 1:25,000 map, with the following elements:

Linear elements

  • Digitised contour lines
  • Digitised lake contours
  • Main breaklines in the Alps


Points 

  • Digitised altitude points and lake bed points
     

Delivery format

  • ESRI Shapefile

DHM25 - Matrix Model

The height matrix with 25 m grid is interpolated from the basis model. An enlarged grid of 200 m is also available.

Delivery format

  •  ESRI ASCII Grid 

For other formats,  orders can be placed via e-mail to geodata@swisstopo.ch

Coordinate system

LV03 LN02 

Accuracy

DHM25 has been derived from the 1:25,000 national map and basically reflects the latter's accuracy. Comparisons of “model heights" with photogrammetric measurements show an average deviation of 1.5 m for the Central Plateau and the Jura, 2 m for the Pre-Alps and the Ticino, and 3 to 8 m for the Alps. 

Documents

Other publications concerning the height models are only available in German and French. Please select your preferred language in the navigation bar to view the desired document.

Sample data

The sample data show their type and format. They are free of charge and may be used for test purposes only. It is not permitted to include them in a product. 


Federal Office of Topography swisstopo Seftigenstrasse 264
P.O. Box
3084 Wabern
Tel.
+41 58 469 01 11

E-mail

Federal Office of Topography swisstopo

Seftigenstrasse 264
P.O. Box
3084 Wabern

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