Abstract

There has been a tremendous amount of research on accuracy, precision and sensitivity of terrestrial laser scanning (TLS) technology from the day it has been first used till today. In this article, geometric and nominal measurements of 3-dimensional (3D) models gathered by scanning object surfaces using TLS were compared to the measurements of real reference models. For this purpose, in order to determine the suitability of models obtained by TLS to the real ones, reference models of concrete samples with simple geometric shapes, such as cubes, rectangular prisms and cylinders were used. These reference models were scanned with Trimble-Mensi GS 100 laser scanner to create 3D models. As a result of the comparison of the length measurements obtained from the reference objects and the models, it was determined that these models are fairly close to reality.

Key words: Terrestrial laser scanners, 3D modeling, accuracy, comparison, reference object.