The project in five facts.
Challenge, approach and results.
The diploma thesis presents the acquisition of spatial data using terrestrial 3D laser scanning technology, as this technology is increasingly used in various economic and non-economic sectors. At the beginning of the diploma thesis, 3D laser scanning technologies are presented, which are divided into five different technologies according to the method of scanning and acquiring data from the environment and objects to be scanned. The 3D laser scanner instrument Leica RTC360, which was used in the practical part of the diploma thesis, is presented and described in more detail. He found that in the given case, the 3D laser scanning survey is more detailed than the geodetic survey made with an electronic total station, which was produced by a geodetic company.
Problem
The diploma thesis presents the acquisition of spatial data using terrestrial 3D laser scanning technology, as this technology is increasingly used in various economic and non-economic sectors. At the beginning of the diploma thesis, 3D laser scanning technologies are presented, which are divided into five different technologies according to the method of scanning and acquiring data from the environment and objects to be scanned. Various types of laser scanners are presented according to their mode of operation.
Solution and Method
The 3D laser scanner instrument Leica RTC360, which was used in the practical part of the diploma thesis, is presented and described in more detail. The case under consideration is focused on verifying the usability of the Leica RTC360 instrument, specifically whether the obtained georeferenced point cloud is suitable for placement in the national coordinate system and consequently in the officially produced geodetic plan. A comparison of data obtained from the geodetic company and 3D scanning data is carried out.
Results
He found that in the given case, the 3D laser scanning survey is more detailed than the geodetic survey made with an electronic total station, which was produced by a geodetic company. It should be noted that the geodetic company used an instrument that meets the accuracy requirements for such surveys, such as a building survey and the production of a geodetic plan for obtaining a building permit or registering a building in the real estate cadastre and the like. During the process of comparing the surveys, he found that when placing virtual targets, which are necessary for the manual method of georeferencing the point cloud, one must be very precise.
He found that black and white targets must be positioned in such a way, or the position of the scanner must be chosen in such a way, that the scanner is directed as perpendicularly as possible to the target. For surveying with a total station, it is also important that the position of the targets is measured as perpendicularly as possible and that the coordinates in space are determined. For later more precise surface analysis, the distance from the surface being scanned is also very important.
For the scanner he used, the optimal scanning distance from the scanned surface is approximately 8 m. As it turned out, the Leica RTC360 instrument is a very versatile scanner. With it, one can quickly, qualitatively and accurately obtain the described spatial data about the object being scanned.
Module, programme and stories.
Your diploma project for a real company.
A diploma thesis at Academia solves a challenge from a company – often the one where you do your 800 hours of placement. Read about the Gradbeništvo module or book a consultation.