A high resolution laser scanning model of the Roman theater in Pinara, Turkey - comparison to previous measurements and search for the causes of damage

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• 作者：Klaus-G. Hinzen ; Stephan Schreiber ; Sebastian Rosellen
• 关键词：Archaeoseismology ; Laser scanning ; Coseismic deformation ; Pinara ; Turkey
• 刊名：Journal of Cultural Heritage
• 出版年：2013
• 出版时间：September-October, 2013
• 年：2013
• 卷：14
• 期：5
• 页码：424-430
• 全文大小：1758 K

文摘

The archaeological site Pinara, southwest Turkey, which includes several remarkable objects of cultural heritage, has been the focus of several previous archaeoseismic studies. One of these examined the setting of the Roman theater in the east of Pinara by a lidar survey. A gross inclination of the stone rows of the auditorium of 0.81¡ã towards N 314¡ãE was interpreted as a consequence of recent coseismic tectonic movements. A new survey of the theater with a terrestrial phase laser scanner is the basis for a model with 15?times higher resolution and 28?times more data points. Parallel to the fieldwork in this study, the process and accuracy of the leveling of the 3D point clouds produced by the scanner was tested in a series of experiments. Based on the orientation of the blocks forming the seats of the theater, we suggest six sections with changing average inclination of the seats and a fault line separating a northern and a southern section. While the previously found overall inclination of the auditorium is confirmed by the new model and the dip direction agrees, the inclination is 0.58¡ã compared to previously determined 0.81¡ã. The almost perfect increase of inclination with the height of the first 10 entire seating rows and the nearly constant inclination from row 11 onward, makes systematic measurement errors during the construction a possible cause. This is an alternative scenario to the interpretation of a coseismic displacement of the conglomerate block on which the theater was built.