Three-dimensional surveying and creation of 3D

Currently the laser scanning is the most effective method of three-dimensional surveying and subsequent creation of three-dimensional (3D) models from the measured data. The scanning principle is based on the measurement of the transit time of passage of laser beam from the apparatus to the structure and back. From the classical laser range finders it differs by the number of geodetically surveyed (located) points in very short time (as much as four thousand points in one second). The apparatus enables to survey the structures to a distance of 300 metres with the precision of the surface being modelled from two to five millimetres. According to the need of the density of scanned points (the raster) the size of the raster is chosen, e.g. when scanning the interchange at Považská Bystrica for the planned bridging the raster with the size of 20 x 20 centimetres has been chosen.

The laser scanner shall survey within the pre-set field of view the so-called swarm of points, which is basically the network of points (raster) with even angle spacing. The scanning scope is defined by the scanner field of view, which is, horizontally, the full 360o and vertically 270o.

For each swarm point the directions and the distance from the apparatus are known, which means that we know also its location within the space (spatial location) in absolute values y, x and z of the selected coordinates system. The complicated software (Cyclone – it costs about SKK one million), by means of which the scanner and the computer are operated, is provided also with special modelling functions geared exactly to process the swarm of points.

Financial Savings and Shortening of Works

The minimum time of measurement (geodetic surveying) and adequately short-time restriction in facility operation and/or contact-free measurement without restricting the traffic, belong to most important benefits and advantages of laser scanning. Significantly higher labour productivity reflects in financial savings, but in the higher safety and the maximum shortening of works in field as well.

contact

Contact person: Jozef Beňo
Phone: +421 2 48271 416
E-mail:

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