Determining the usability of the ViDoc device, which integrates with smart phones, in documenting historical structures

Abstract

The documentation of historical structures is considered as a crucial subject in international regulations. The accuracy and speed of documentation are among the significant factors for the qualified transmission of cultural values to future generations. In this study, the accuracy and position precision of ViDoc device, which integrates with an iPad Pro equipped with LIDAR system, have been determined. Furthermore, the advantages and disadvantages of this device have been elaborated in detail. The aim of the study is to determine whether the ViDoc device and iPad Pro can be used in documenting historical structures. The study covers the traditional method of documentation based on measurement with meter and analog devices, documentation with a total station, and documentation with the ViDoc device, using two historical fountains selected as examples. Two cultural heritage fountains located in Kastamonu province, Turkey, have been selected for documentation. Measurements of the fountains were taken using a precision meter and a laser meter in the classical method, and corner point coordinates were obtained with a total station. The measurement process was carried out in one go using a ViDoc device and a smartphone. As a result of the study, it was understood that the ViDoc device made very positive contributions to the scanning accuracy of smart devices with LIDAR sensors. When comparing the measurement values in the documentation of the structures, the accuracy precision was found to be less than 1 cm (0.7 cm), and the positioning accuracy was less than 5 cm. In the measurement conducted without using the ViDoc device, differences in position distances reached up to 79 m. This indicates that the device can be used for documentation in structures without creating disadvantages. However, it has been determined through the study that the device may not be usable for every structure. Nevertheless, the study also evaluates the device as a new alternative alongside traditional documentation, photogrammetry, and terrestrial laser scanning systems. The study is significant as it is the first to holistically determine the measurement accuracy of the device and the positioning accuracy specifically in relation to historical structures.