Abstract
Abstract. The detailed and thorough documentation of monuments is a rather complex process that requires the application of the best available state of the art techniques in order to preserve, restore, promote and make cultural heritage accessible to the public. This paper presents the 3D Geometric Documentation of a part of the medieval fortress of Chios, focussing in particular on the practical challenges which the object presented. The case study is a part of the fortified construction, consisting of a bastion, a watch tower on top of this bastion and a significant part of its walls with a surface of about 1053 m2 in total. The goal of the survey was to produce an accurate 3D detailed textured model and a series of coloured orthophotos and 2D vector drawings. The documentation methods employed included close-range automated photogrammetry and image-based modelling, terrestrial laser scanning and topographic surveys, an ideal combination of methods.
Highlights
Numerous efforts and milestones have been made so far concerning the precise and realistic 3D digitisation of monuments and archaeological sites in order to achieve the necessary accuracy, thoroughness and trueness for the documentation’s products and applications
Three-dimensional Geometric Documentation is the essential way of recording the present state of monuments, as it has evolved through time and supply the necessary metric and informative background to those who investigate the past, and to those who care about the future of monuments
Techniques and methods offer numerous different combinations for the 3D Geometric Documentation of monuments and archaeological sites depending on the level of complexity, the object’s size, the accuracy of the products, the available equipment, the cost and the documentation scale of the project
Summary
Numerous efforts and milestones have been made so far concerning the precise and realistic 3D digitisation of monuments and archaeological sites in order to achieve the necessary accuracy, thoroughness and trueness for the documentation’s products and applications. The products of the 3D digitisation of cultural heritage enable archaeologists, engineers, architects, cultural heritage experts and stakeholders in general to approach their case studies and make decisions in a complete and efficient way as far as the approaches of documentation, restoration and enhancement of monuments are concerned. The main goal of the Geometric Documentation is to record the existing state, the position, size and shape of a monument or archaeological site at a particular moment in time (Tapinaki et al, 2005). The 3D Geometric Documentation of a specific part of the Medieval Fortress of Chios was considered essential in order to generate the necessary products which are intended to be used by the local Archaeological Ephorate for restoration purposes. The development of bastion, believed to be a cylindrical surface, was required
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