Topography
Topographical and architectonic relief:
With the aid of appropriate instrumentation, in particular with a complete measurement station, it is possible to measure topographical territory and geometric typological reliefs on buildings.
The acquisition of base data, useful for representation in maps and the designing is a task well established by the institute, using the strong collaboration with the departments of Architecture and Civil Engineering.

Land survey

Image Land survey

The most ancient method of measurements is the land survey, which means the direct measurement on the territory. The tachymeter is the measuring instrument used the most. Distances and angles can be measured using this instrument, calculating coordinates and height of detected objects.
Recent digital instruments execute these calculations directly. The measured data remain stored and can be transferred to a computer for ulterior elaborations.
 

The Leveling

Image The Leveling

The leveling is a very precise and reliable method for determining height differences. The leveling instrument, with the sight line in horizontal, is placed between two vertical rods. The difference between the readings of the two rods is the difference in height.

The global positioning satellite system (GNSS)

Image The global positioning satellite system (GNSS)

GNSS systems are by now crucial in the field of the official measurement. The navigation satellites orbit around our planet and they constantly send signals that are registered using special receivers. With these signals one can determine the distances, used to calculate the position of the receivers. By means of special methods of measurements and calculations or using referenced data of Switzerland’s automatic GNSS network (AGNES), one can calculate the coordinates in a short time with the precision of some centimeters.

Contacts
st.wwwsupsi@supsi.ch