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Abstract
Structure from motion (SFM) algorithms greatly facilitates the production of detailed 3D models from photographs we applied this technology for the purposes of Building Information Modeling (BIM) of a historic fortress in Lebanon. Aerial and terrestrial imagery processed in SFM-based software for exterior and interior 3D modeling of the fortress. In this paper, we applied new geospatial technologies, aerial and terrestrial photogrammetry for Historic Building Information Modeling HBIM database construction. The UAV used for aerial photogrammetry, a DJI Phantom 4 pro with a camera of 20 megapixels for building facades capturing and a DSLR camera for the terrestrial photogrammetry inside the fortress. Aerial and terrestrial images processed in Agisoft Photoscan for the construction of Toron fortress HBIM of a block Geographical Information System constituted from points cloud, Digital Surface Models (DSM) and Digital Ortho Models (DOM). HBIM is a novel prototype library of parametric objects, based on historic architectural and archeological data and a system for mapping parametric objects on to point clouds database. As a result, the production of Toron fortress HBIM database containing Geographical Information Systems (GIS) and Computer Aided Design (CAD) features and entities in the form of sections plans and 3D models for both the analysis and conservation of historic objects, structures, and environments.
Highlights
The terms heritage Building Information Modeling (BIM), Historic Building Information Modelling, HBIM will be used throughout this publication when referring to any use of BIM for heritage and archaeology
OF THE RESEARCH AND DISCUSSION An HBIM for Toron fortress was built with a commonly used SfM technology based on Photoscan software
The HBIM of Toron fortress constituted from geographical information system (GIS) and Computer Aided Design (CAD) databases, the GIS database figure 6a containing a Digital Ortho Model (DOM) for the whole fortress it helps architects and archeologists digitizing detailed accurate plans, besides the Digital Ortho Models (DOM) a Digital Surface Model (DSM) generated form photogrammetric software expressing the terrain elevations and structures
Summary
The terms heritage BIM, Historic Building Information Modelling, HBIM will be used throughout this publication when referring to any use of BIM for heritage and archaeology. Information about historic buildings and archaeological sites is represented as, reports, drawings, computer-aided design in CAD; 2D or 3D, but with new geospatial technologies datasets as point clouds, 3D triangulated irregular networks (TIN), Digital Surface Models (DSM) and Digital Ortho Models (DOM). As HBIM is capable of incorporating both qualitative and quantitative information about a built asset to represent physical and functional characteristics, which could be integrated into a 3D model allowing information extraction. By incorporating high-quality digital survey datasets, HBIM represents the appearance of the existing historic fabric and allows the exploration and complex analysis of several applications such as conservation planning, maintenance, heritage management, and interpretation
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