This research is based on the preliminary physical and petrographic characterization applied with the support of advanced 3D modeling developed from laser scanner survey data. The subject of the investigation is a volcanic rock engraved with a group of ancient tombs carved within a great zoomorphic stone which shape recall the one of an elephant. The research about this "domus de janas" (the named used to indicate certain ancient sepulchral monuments quite common in the Anglona area, North-west of Sardinia) started gathering the 3D digital models with a high level of details and developing this virtual model with its great accuracy within its geographical -virtual- environment. The further steps were aimed at providing a first set of information about its petrophysical characteristics, decay state (from petrographic composition to their alteration processes and their causes), and the evidences of the missing parts fallen during the ancient collapse which gave the stone its special shape. All the informations were composed according to a detailed 3D representation, based on the original laser scanner survey. The main task is to show how to put together the 3D survey of this monument with all the data about its degradation. The further development of the gathered data will be aimed to the definition of a searchable model with all these informations linked in it. At the same time a set of specific digital models will be developed, to cover different tasks, from the virtual exploration to the 3D printing (from the scaled representation to the creation of "spare parts"). This research will be aimed to produce 2 main benefits: a complete reconstruction of the original structure of the Neolithic tombs, including the collapsed parts; a correct definition of the decay state and of the potential threats on the future of this natural/human monument conservation.
DECAY PROCESSES AND THREE-DIMENSIONAL DIGITAL MODELLING FOR GEOMETRIC-SPATIAL RECONSTRUCTION OF THE VOLCANIC STONE CALLED “THE ELEPHANT” OF NEOLITHIC “DOMUS DE JANAS” (SARDINIA, ITALY): INVESTIGATION
COLUMBU, STEFANO;
2013-01-01
Abstract
This research is based on the preliminary physical and petrographic characterization applied with the support of advanced 3D modeling developed from laser scanner survey data. The subject of the investigation is a volcanic rock engraved with a group of ancient tombs carved within a great zoomorphic stone which shape recall the one of an elephant. The research about this "domus de janas" (the named used to indicate certain ancient sepulchral monuments quite common in the Anglona area, North-west of Sardinia) started gathering the 3D digital models with a high level of details and developing this virtual model with its great accuracy within its geographical -virtual- environment. The further steps were aimed at providing a first set of information about its petrophysical characteristics, decay state (from petrographic composition to their alteration processes and their causes), and the evidences of the missing parts fallen during the ancient collapse which gave the stone its special shape. All the informations were composed according to a detailed 3D representation, based on the original laser scanner survey. The main task is to show how to put together the 3D survey of this monument with all the data about its degradation. The further development of the gathered data will be aimed to the definition of a searchable model with all these informations linked in it. At the same time a set of specific digital models will be developed, to cover different tasks, from the virtual exploration to the 3D printing (from the scaled representation to the creation of "spare parts"). This research will be aimed to produce 2 main benefits: a complete reconstruction of the original structure of the Neolithic tombs, including the collapsed parts; a correct definition of the decay state and of the potential threats on the future of this natural/human monument conservation.
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