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Consulting / Analyses

swisstopo collects and analyses basic data for all geodetic activities. Here the focus is on the creation and maintenance of a spatial reference, both for location and for height. swisstopo advises third parties with respect to geodetic issues and carries out calculations.

Employees of swisstopo during measurement work on the Jungfraujoch
Employees of swisstopo during measurement work on the Jungfraujoch

swisstopo offers the following geodetic services:

  • Three-dimensional computations with geopotential models: geoid (geoid-ellipsoid separation, deviations from the vertical), quasi-geoid (geoid anomalies), gravity (normal gravity, interpolated gravity), etc.
  • Computation of rigorous heights, e.g. orthometric and normal heights from geopotential numbers
  • Extremely precise calculation of coordinates of reference points through GNSS measurements and evaluations in the LV95 reference frame, supported by the permanent AGNES stations
  • Calculation of magnetic inclination and declination
  • Transformations and interpolations of coordinates and heights into existing constrained reference frames (LV03, LN02, etc.)

Here the following methods are applied: 

  • GNSS (static)
  • Precision levelling
  • Gyroscope measurements
  • Gravity measurements
  • Plumb-line deflection measurements

The fields of application for geodetic services are as follows:

  • High-precision basic measurements with GNSS to calculate reference points in the LV95 reference frame
  • Geodetic deformation for the investigation of tectonic movements in the earth's crust (terrestrial and with GNSS)
  • Orientation transfer by means of gyroscope measurements for projects with no line of sight to the exterior (e.g. in tunnel construction)
  • Staking out astronomic or magnetic azimuths for scientific purposes or special applications
  • Measurement of astronomic-geodetic profiles with GNSS, levelling and plumb-line deflection measurements, e.g. validation of geoid models
  • Measurement of orthometric height differences (combined levelling and gravity measurements) for infrastructure projects with the corresponding requirements
  • Conventional engineering surveys on behalf of internal partners, e.g. the armed forces


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

E-mail


Relevant authority

Geodesy and Federal Directorate of Cadastral Surveying
E-mail

Federal Office of Topography swisstopo

Seftigenstrasse 264
P.O. Box
3084 Wabern

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