Efficiently capturing large,complex cultural heritage sites with a handheld mobile 3D laser mapping system |
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| Institution: | 1. Autonomous Systems, CSIRO Computational Informatics, Brisbane, Australia;2. School of Architecture, The University of Queensland, Brisbane, Australia;1. Laboratorio di Conservazione e Restauro del Libro, Università degli Studi di Roma Tor Vergata, Via Columbia 1, 00133 Roma, Italy;2. Dipartimento di Ingegneria Industriale, Università degli Studi di Roma Tor Vergata, Via del Politecnico 1, 00133 Roma, Italy;1. Faculty of Civil Architecture, Politecnico di Milano, Milano 20133, Italy;2. Research Institute for Sustainable Humanosphere, Kyoto University, Uji Kyoto 611-0011, Japan;3. Department of Civil and Environmental Engineering, Politecnico di Milano, Milano 20133, Italy;4. Geomatics Research & Development, Como 22100, Italy;1. Department of Industrial Engineering (DII), University of Naples Federico II, P. le Tecchio 80, Naples, Italy;2. Competence Center for Cultural Heritage Digitization (CC CHD), Fraunhofer IGD, Fraunhoferstr. 5, Darmstadt, Germany;3. Interactive Graphics Systems Group (GRIS), Technische Universität Darmstadt, Fraunhoferstr. 5, Darmstadt, Germany;4. Department of Electrical Engineering and Information Technology (DIETI), University of Naples Federico II, Via Claudio 21, Naples, Italy;1. Department of Cartographic Engineering, Geodesy and Photogrammetry, High School of Civil Engineering (UPV), 46022 Valencia, Spain;2. Department of Architectural Projects, High School of Architecture (UPV), 46022 Valencia, Spain;3. Area of Cartographic Engineering, Geodesy and Photogrammetry, Polytechnic High School of Lugo (USC), 27002 Lugo, Spain |
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| Abstract: | Accurate three-dimensional representations of cultural heritage sites are highly valuable for scientific study, conservation, and educational purposes. In addition to their use for archival purposes, 3D models enable efficient and precise measurement of relevant natural and architectural features. Many cultural heritage sites are large and complex, consisting of multiple structures spatially distributed over tens of thousands of square metres. The process of effectively digitising such geometrically complex locations requires measurements to be acquired from a variety of viewpoints. While several technologies exist for capturing the 3D structure of objects and environments, none are ideally suited to complex, large-scale sites, mainly due to their limited coverage or acquisition efficiency. We explore the use of a recently developed handheld mobile mapping system called Zebedee in cultural heritage applications. The Zebedee system is capable of efficiently mapping an environment in three dimensions by continually acquiring data as an operator holding the device traverses through the site. The system was deployed at the former Peel Island Lazaret, a culturally significant site in Queensland, Australia, consisting of dozens of buildings of various sizes spread across an area of approximately 400 × 250 m. With the Zebedee system, the site was scanned in half a day, and a detailed 3D point cloud model (with over 520 million points) was generated from the 3.6 hours of acquired data in 2.6 hours. We present results demonstrating that Zebedee was able to accurately capture both site context and building detail comparable in accuracy to manual measurement techniques, and at a greatly increased level of efficiency and scope. The scan allowed us to record derelict buildings that previously could not be measured because of the scale and complexity of the site. The resulting 3D model captures both interior and exterior features of buildings, including structure, materials, and the contents of rooms. |
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| Keywords: | 3D digitisation Laser scanning Mobile mapping Heritage sites Documentation Large-scale scenes Peel Island |
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