Evaluation of the positional accuracy of terrestrial laser scanner using a perpendiculars 3D plans system

Abstract

Instrument calibration is recognized as an important process for quality assurance of data obtained from a terrestrial laser scanner (TLS). An important aspect in ensuring the quality of three-dimensional point cloud captured with TLS instruments is geometric calibration. Systematic errors inherent in the instruments, if not corrected, can degrade the accuracy of the cloud of points obtained by the scanner. Additionally, in geoscience applications, LST systems are regularly transported and installed in rough terrain and harsher environments. Thus, the use of an easy-to-apply methodology for TLS measurement allows quantification and evaluation of the quality and accuracy of a terrestrial laser scanner. This article presents the proposal of a method of TLS measurement using a three-dimensional system of perpendicular planes, where from the cloud of points of the different planes can obtain the 3D accuracy of the TLS. The results obtained prove the efficiency of the methodology, suggesting its use in laboratory calibration procedures using short-range scans.