The aim of this thesis was to research into how reliant a surveyor can be upon using a laser scanner for large-scale data capture. This was achieved by running the ScanStation 2 through a number of different calibration testing methods, using it for a real life application and evaluating these results.
The accuracy of the measurements achieved by the scanner found by the fieldwork in this thesis was higher than originally expected. The results of the height comparison test gave the first indications of the height accuracies of the scanner, producing an average 1.6mm difference (across 30 independent points) to the heights obtained from the EDM, which was very encouraging. The level of horizontal accuracy in the calibration test found differences of the 1-2mm range.
In retrospect, the testing could have been in improved by carrying out the EDM control work simultaneously. Time constraints meant the control work was carried out in two sessions over two separate days, although they were under similar conditions and the distance between the points used to connect both days’ work (i.e. points 2 and 3) was exactly the same.
Through the investigations and subsequent testing carried out in this thesis, it can be concluded that a surveyor can rely, with confidence, upon the Leica ScanStation 2 to consistently produce three-dimensional measurements of a high accuracy.
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