Gravity Field Consortium

In the field of gravity measurement, swisstopo offers a variety of services in cooperation with the Mathematical and Physical Geodesy Section of the Federal Institute of Technology, Zurich, including gravity and vertical height deviations, as well as a broad range of calculation and modelling services. It also provides the official geoid model of Switzerland (CHGeo2004), which is required in all precision GNSS receivers for determining heights, as well as software for calculating vertical height deviations and levelled and orthometric heights.

The Geoid in Switzerland
The Geoid in Switzerland

During the past 15 years and under the auspices of the Swiss Geodetic Commission, the Geodesy and Geodynamics Lab (GGL) at the Federal Institute of Technology, Zurich and swisstopo have been developing a new geoid model and various programmes for calculating gravimetric data (e.g. deflections of the vertical and orthometric heights).

In order to ensure optimal collaboration and the legitimate use of the gravity data and software, swisstopo and the GGL established the "Swiss Gravity Field Consortium" (SKS).

This service includes on-site gravity observations and their adjustment, as well as various kinds of computations.

swisstopo is also the contact for delivering:

  • Observed and computed gravity values
  • Calculated vertical height deviations
  • Orthometric corrections
  • Computed geoid heights and height anomalies

Graphic of the Gravity
Gravity in Switzerland (-980'000 mgal) [1 mgal = 0.00001 ms-2]

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


Contact Person

Dr. Urs Marti
Dipl. Ing. ETH
Geodetic Surveying
Tel. +41 58 469 03 78

Print contact

Federal Office of Topography swisstopo

Seftigenstrasse 264
P.O. Box
3084 Wabern


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