Evaluation of records using terrestrial laser scanner in architectural heritage for information modeling in HBIM construction: The case study of the La Anunciación church (Seville)

Abstract

In recent years, significant progress has been made in the creation of equipment that captures the so-called personal spatial data records. The size and its price compared to other equipment, make it ideal for works related to historical-artistic heritage. In this research, a comparison is made between two scanners used in geodetic measurements for the purpose of Building Information Modeling (BIM) in historic buildings. A stationary BLK360 personal scanner has been chosen, which is considered to be a scanner that is easy to use and very operational in transport. Despite its precision, this equipment has been used in numerous Scan-to-BIM studies. To know the reliability conditions of the equipment, the Riegl VZ400i scanner, a state-of-the-art stationary scanner, is taken as a reference. The objective is to know the precision of both teams to develop planimetric surveys of a historic building in BIM. The methodology used is based on comparing both point clouds, knowing the density and organization and the attributes that can help as parameters in the BIM methodology. Also, and as an auxiliary base, two topographic equipment, a total station and a state-of-the-art laser measurer were used, and the precision of both was analyzed. The results show that the differences between the PLS and TLS are not excessively large, reaching differences of 10 mm in small lengths and 16 mm in longer lengths and, therefore, admissible for a Scan to BIM procedure.