Abstract
Abstract. The paper describes an operational working methodology to be applied for surveys with phase-shift laser scanning, which allows defining a guidelines system to optimize in-field data collection. While reducing the number of scan positions still using the same quality, it is possible to obtain smaller files, in order to limit the computational requirements during editing and post-production. Nonetheless, this methodology guarantees results that are qualitatively comparable to the standard data collection process. Consequently, the angle ranges have been analyzed to find a value that guarantees for the survey a point cloud lighter and more manageable and, at the same time, that maintains a reasonable accuracy. Subsequently, two parameters were defined, “redundancy” and “closeness”, to find an operational process that allows to schematize what is usually achieved with the help of experience in the field: to evaluate the minimum number of scan points that can ensure the necessary overlap for optimal coverage of the entire building surveyed. After defining the study of the ideal situation, the model is applied in a case study, situated in a densely built context, typical of European historical urban centers: the main façade of the G. Ciamician Institute of Chemistry of the University of Bologna (Italy).
Highlights
In recent years, the cultural heritage sector, in particular in the architectural area, has been increasingly affected by the development of innovative surveying techniques
The paper has illustrated an operational procedure to be conducted before the survey campaign, to simplify the data collection and to obtain an accurate and complete but lighter and more manageable point cloud
Simple guidelines were introduced to reproduce the decisions generally dictated by the user survey experience, during the project of the scan points
Summary
The cultural heritage sector, in particular in the architectural area, has been increasingly affected by the development of innovative surveying techniques. 3D laser scanning and other innovative survey techniques have a high degree of detail that faithfully reproduces these objects (Fontana et al, 2002). These geomatic technological solutions have allowed surveying the specificities and problems of cultural sites accurately. The study and preparation of the scanning points is a fundamental phase when planning a survey campaign. At this moment, the survey goals have already been established. The results show that the scanning angle effect can still be moderate until 15 degrees (Ling et al, 2008)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
