Abstract
Some issues regarding the calibration results pertaining to the ground-based laser scanner Leica Scanstation C10 are presented and analysed. The calibration was carried out at Kyviškės Calibration Baseline (Jokela et al. 2002) and the special cyclic error detection baseline at the Research Institute of Geodesy of Vilnius Gediminas Technical University. The instrument was calibrated at 20, 100, 180, 200 and 260 m distances at Kyviškės Calibration Baseline and the indoors baseline from 1 to 15 m with continuous 1 m interval. The special procedure of indirect measurements was suggested to estimate errors of scanner measurements. During this procedure, the positions of the scanstation varied from the calibration baseline pillars to the standard tripods creating triangles of different shapes. The distances obtained by scanning targets placed on the calibration baseline pillars were compared with baseline standard distances. Suggested improvements in the calibration technology could be used for verification and calibration of terrestrial laser scanstations at the calibration baselines.
Highlights
Terrestrial 3D laser scanners (TLS) – a new class of survey instruments – have become popular and are increasingly used in providing as-built and modelling data in various applications, including land surveying, archaeological studies, architecture, bridge structures, and highway surveys
In order to minimise the systematic influence of the instrumental errors, scanners have to be calibrated and observations have to be corrected on the basis of the calibration parameters (Ingensand 2006)
In the context of TLS, the reliable accuracy assessment is rather complicated due to the fact that laser scanners are constructed in a way completely different from the traditional survey equipment. (Pfeifer, Briese 2007)
Summary
Terrestrial 3D laser scanners (TLS) – a new class of survey instruments – have become popular and are increasingly used in providing as-built and modelling data in various applications, including land surveying, archaeological studies, architecture, bridge structures, and highway surveys These scanners could measure thousands of data points (distance, angle, and reflected return signal power) per second and generate a very detailed “point cloud” data set. 1. Calibration of the distance measuring device of the terrestrial laser scanner at the cyclic error determination baseline. The calibration of the distance measuring device of the terrestrial laser scanner Leica Scanstation C10 was performed using the cyclic error determination baseline at the Calibration Laboratory of the Research Institute of Geodesy of Vilnius Gediminas Technical University (Jokela et al 2002; Buga et al 2008, 2011). Antanavičiūtė et al Some issues regarding the calibration of the terrestrial laser scanner
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