Significance of Geometrical Condition in Preserving the Quality of TLS Measurement

Abstract

To acquire complete three-dimensional (3D) data that cover the whole surface of the scanned object, multiple scan stations are inevitable. Thus, the registration process is compulsory to oriented TLS multi local coordinate into one global coordinate system. Taking into account the fundamental principle of error propagation in network design, an open network solution for TLS measurement is impacted to yield uncertainties. To investigate this issue this study has been carried out to verify the effect of error propagation in the TLS pre-processing procedure. Two types of network configurations have been established: i. Closed; and ii. Open networks. To measure the accuracies of both configurations, 3D traversing has been performed in establishing six (6) reference points. With the aid of the reference points, the results demonstrated that by neglecting the geometrical condition the accuracy of TLS pre-processed data might be reduced up to 33 percent. To preserve the quality of the final real-world representation derived from TLS measurement, it is advisable to take into account this fundamental principal