Point cloud models with Terrestrial Laser Scanner (TLS) applied to recording built heritage: Workflow implication in results quality

Abstract

Points-Cloud are mathematical models which use spatial coordinate (XYZ) that represent the built physical space. In the last decade, point-cloud has been widely applied to built heritage register, because among its benefit this type of registration allows capture a high level of geometric detail, especially when it is performed with Terrestrial Laser Scanner (TLS). However, results can present variations in precision values in function of the process that is taken. The aim of this paper is to analyze the process of building measurement capture with the use of TLS to explain how some parts of the workflow can improve or affect points-cloud models. The results of this study are useful to future projects of TLS registration, due to the fact that it presents the main consideration to be taken into account and thus reduce errors to improve points-cloud models.