GEOMATICS TECHNIQUES FOR THE 3D DOCUMENTATION AND VISUALIZATION OF ARCHAEOLOGICAL BUILDING

The work illustrates the surveying of a small but spectacular Romanesque church close to the castle of San Giovanni d’Asso (Siena, Italy). Using terrestrial laser scanning (TLS) and image-based techniques, a complete 3D model of the interior and exterior of the church was produced. . TLS was employed for the interior of the church, which consists of a main floor above a very small crypt, the recording of which was complicated by a plethora of columns and arches. The image data were acquired with consumer-grade digital cameras along with a model radio-controlled helicopter to capture details of the roof and the apse which were not visible from ground level. The 3D survey, representation and reconstruction of San Pietro in Villore should become a case study of scientific research addressed to test a simulation based open-space where it is possible in every moment to measure and compare historical evidence, stratigraphical relationship and other datasets but also where is possible to improve and upgrade the record in the future on the basis of new field work or post-processing.