Surveying laboratory

The topographic calibration lab of the Department of Geography is used for storage of topographic equipment and for the calibration of survey equipment. The calibration can be carried out using the following set-ups:

Measuring bank

The measuring machine is intended primarily for the control of electro-optical distance meters, in addition, can also be the direct and the optical distance measurement to be checked, the principle consists in that the distance measurement of the EDM will be compared to the distance measurement of a precise device. In order to be able to measure different distances, is mounted on the measuring bench, a guide which can move a trolley. Since in each case is measured the distance to the trolley, different distances can be measured by placing the trolley at different positions.

The measuring machine consists of a masonry structure. Then is attached a guide on which a truck can move. The reference measuring system is a laser interferometer. At one end of the measuring machine is provided with a fixed point at which the total station, with the electro-optical distance meter, can be placed, at the other end, the interferometer. Both rangefinders require a reflector. On the trolley is therefore an end-piece on which the two reflectors are attached.



Collimator

To check if the level devices are correctly calibrated, the collimator can be used. In the lab there is a table where the collimator is installed. Just before the collimator, a fixed mounting point is fixed. The level device can be placed on that mounting point to perform the check.


Fixed pilars

In the lab there are thirteen solid pilars. Along both sides of the measuring machine are in each case six of those installation points between at variable distance from each other. These sites are mainly used in the practice of industrial measurements on an object on the measuring bench and for determining the summation constant.