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Remote Sens. 2017, 9(3), 189;

Mobile LiDAR System: New Possibilities for the Documentation and Dissemination of Large Cultural Heritage Sites

TIDOP Research Group, University of Salamanca, Polytechnic School of Avila. Hornos Caleros, 50, 05003 Avila, Spain
Department of Natural Resources & Environmental Engineering, University of Vigo, School of Mining Engineering, Maxwell s/n, 36310 Vigo, Spain
Author to whom correspondence should be addressed.
Academic Editors: Rosa Lasaponara, Nicola Masini and Prasad S. Thenkabail
Received: 10 November 2016 / Revised: 30 December 2016 / Accepted: 20 February 2017 / Published: 23 February 2017
(This article belongs to the Special Issue Remote Sensing for Cultural Heritage)
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Mobile LiDAR System is an emerging technology that combines multiple sensors. Active sensors, together with Inertial and Global Navigation System, are synchronized on a mobile platform to produce an accurate and precise geospatial 3D point cloud. They allow obtaining a large amount of georeferenced 3D information in a fast and efficient way, which can be used in several applications such as the 3D recording and reconstruction of complex urban areas and/or landscapes. In this study the Mobile LiDAR System is applied in the field of Cultural Heritage aiming to evaluate its performance with the purpose to document, divulgate, or to develop an architectural analysis. This study was focused on the Medieval Wall of Avila (Spain) and, specifically, the performed accuracy tests were applied in the “Alcazar” gate (National Monument from 1884). The Mobile LiDAR System is then compared to the most commonly employed active sensors (Terrestrial Laser Scanner) for large Cultural Heritage sites in regard to time, accuracy and resolution of the point cloud. The discrepancies between both technologies are established comparing directly the 3D point clouds generated, highlighting the errors affecting the architectural structures. Consequently, and based on a detailed geometrical analysis, an optimization methodology is proposed, establishing a segmented and classified cluster for the structures. Furthermore, three main clusters are settled, according to the curvature: (i) planar or low curvature; (ii) cylindrical, mild transitions and medium curvature; and (iii) the abrupt transitions of high curvature. The obtained 3D point clouds in each cluster are analyzed and optimized, considering the reference spatial sampling, according to a confidence interval and the feature curvature. The presented results suggest that Mobile LiDAR System is an optimal approach, allowing a high-speed data acquisition and providing an adequate accuracy for large Cultural Heritage sites. View Full-Text
Keywords: cultural heritage; mobile LiDAR system; point cloud; terrestrial laser scanner; accuracy assessment; optimization cultural heritage; mobile LiDAR system; point cloud; terrestrial laser scanner; accuracy assessment; optimization

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Rodríguez-Gonzálvez, P.; Jiménez Fernández-Palacios, B.; Muñoz-Nieto, Á.L.; Arias-Sanchez, P.; Gonzalez-Aguilera, D. Mobile LiDAR System: New Possibilities for the Documentation and Dissemination of Large Cultural Heritage Sites. Remote Sens. 2017, 9, 189.

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