Technology
The technology of laser scanning is among the most modern methods of geo-data gathering. It finds its use especially in those fields where there is a need for precise 3D data.
The principle of the laser scanning method is essentially the following: we send a laser beam measuring the distance that it takes to reach the surveyed surface or object. At the same time, we register the direction with the help of. We obtain the information about one definite point of surface by evaluating all parametres. The laser device can be placed statically on the ground (terrestrial laser scanning) or in an ariplane or helicopter (aerial laser scanning). For special applications, the placing of terrestrial laserscans in a driving vehicle is used.
The primary output of the laser scanning is a set of 3D coordinates of the reflected points – the so-called point cloud. With the help of automatic, semi-automatic and manual procedures the classification of these points takes place in further processing. In some cases, it is possible to use the information on the intensity of the reflection, eventually about the real colour of every reflection (in the event of the simultaneous acquisition of digital images of the object it is possible to colour the cloud with the help of these photographs). The final output of the data processing from laser scanning can be, for example, a very detailed terrain or surface model in the form of a triangular model or a generalized 3D vector model.
The company GEODIS BRNO has long-term experience with laser scanning technology. We have two terrestrial scanners at our disposal:
RIEGL LMS - Z360 a Z+F Imager 5006
We have experinece with data processing from all sorts of devices like Optech, TopeEye, Leica, Flimap or Riegl.
You will find more detailed information on the pages on terrestrial and aerial applications
