Articles by Vladimiro Achilli
"Mura Bastia". Dati archeologici, informatizzazione e rilievi 3D laser scanning del Castello degli Onigo (Pederobba, Treviso)
Matteo Frassine, Alessandro Bezzi, Massimo Fabris, Vladimiro Achilli, Denis Bragagnolo
Abstract
This paper concerns computer applications for the management of archaeological data through GIS software, as related to the 2008 excavation campaign at “Mura Bastia”, Onigo (Treviso), Italy. The approach allows for the correlation of data previously acquired with those collected more recently using newer technologies. The shift from the traditional way of drawing archaeological records to the new digital technique began during the excavation of 2007. All of the walls and the layers were documented using a total station and a digital camera (photo-mosaic method). The elaboration of raw data was obtained using Free and Open Source Software only (GRASS, E-FOTO, GIMP, OPENJUMP, gvSIG). All of the new information levels (bi-dimensional raster and vector layers) were connected with the digitized plan of the old excavation into a GIS project that became the final product of the whole work. 3D terrestrial laser scanning surveys, integrated with classical topography and digital photogrammetric methodologies, allowed us to extract an accurate and photorealistic digital model of the Onigo castle. Moreover, a partial 3D virtual anastylosis of the tower was completed thanks to the reallocation of two missing elements in their correct position.
«Archeologia e Calcolatori» 2009, 20, 351-372; doi: 10.19282/ac.20.2009.26
“Mura della Bastia” – Onigo di Pederobba (Treviso). Ricerche archeologiche, rilievo 3D laser scanning e anastilosi virtuale in un castello medievale del pedemonte trevigiano
Matteo Frassine, Guido Rosada, Massimo Fabris, Vladimiro Achilli, Denis Bragagnolo, Alessandro Bezzi
Abstract
The paper presents the results of the ongoing research coordinated by the Chair of Ancient Topography at the University of Padova. The work concerns the medieval site of “Mura della Bastia” in Onigo di Pederobba (Treviso), in the North-Eastern part of Italy. Historical information from written documents and results obtained from the archaeological investigation at the Onigo castle (1994-2007) are discussed. The study provided the historical reconstruction of recent collapses of the Onigo tower and allowed the virtual reconstruction of still-cohesive blocks, which had fallen down in 1989, and which were recovered during the summer of 2007. At this time, five of the ten building blocks have been positioned; the procedure was carried out by comparing the panoply of each agglomerate with the prospect of the tower, which was obtained from the photogrammetric rectification of the historical images (2D). The 3D survey of the tower and of nine blocks was performed with a Leica HDS 2500 laser scanner. The resulting point clouds were aligned with Cyclone software, also using the coordinates of some laser scanning targets, which were measured with the Leica TC 2003 total station in a local reference system. The final 3D model obtained by the co-registration of the scans was textured with the digital images acquired with a Canon EOS 1 ds Mark II camera. Subsequently, three of the five recognized blocks were positioned on the 3D model using Reconstructor software.
«Archeologia e Calcolatori» 2008, 19, 293-321; doi: 10.19282/ac.19.2008.23
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