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ISPRS Int. J. Geo-Inf. 2019, 8(2), 61;

Diachronic Reconstruction and Visualization of Lost Cultural Heritage Sites

Department of Mining Technology, Topography and Structures, Universidad de León, Avda. Astorga, s/n, 24401 Ponferrada (León), Spain
TIDOP Research Group, University of Salamanca, Avda. de los Hornos Caleros, 50, 05003 Ávila, Spain
Department of Cartographic and Land Engineering, University of Salamanca, Avda. de los Hornos Caleros, 50, 05003 Ávila, Spain
Author to whom correspondence should be addressed.
Received: 10 December 2018 / Revised: 23 January 2019 / Accepted: 27 January 2019 / Published: 29 January 2019
(This article belongs to the Special Issue Data Acquisition and Processing in Cultural Heritage)
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Cultural heritage (CH) documentation is essential for the study and promotion of CH assets/sites, and provides a way of transmitting knowledge about heritage to future generations. The integration of the fourth dimension into geospatial datasets enables generating a diachronic model of CH elements, namely, a set of three-dimensional (3D) models to represent their evolution in various historical phases. The enhanced four-dimensional (4D) modeling (3D plus time) pursues a better understanding of the CH scenario, enriching historical hypotheses as well as contributing to the conservation and decision-making process. Although new geomatic techniques have reduced the amount of fieldwork, when put together, the geometric and temporal dimensions imply the interpretation of heterogeneous historical information sources and their integration. However, this situation could reach a critical point when the study elements are no longer present. The main challenge is to harmonize the different historical and archaeological data sources that are available with the current remains in order to graphically rebuild and model the lost CH assets with a high degree of reliability. Moreover, 4D web visualization is a great way to disclose the CH information and cultural identity. Additionally, it will serve as a basis to perform simulations of possible future risks or changes that can happen during planned or hypothetical restoration processes. This paper aims to examine the study case of a diachronic reconstruction by means of a mobile laser system (MLS) and reverse modeling techniques for a lost urban CH element: the citadel or Alcázar gate of Ávila. Within this aim, the final model is evaluated in terms of the consistency of the historical sources to assess its suitability considering the constructive interpretations that are required to integrate heterogenous data sources. Moreover, geometric modeling is evaluated regarding the current remains and its surroundings. Finally, a web 4D viewer is presented for its dissemination and publicity. This paper is an extended and improved version of our paper that was published in the 2018 ISPRS Technical Commission II Symposium, Riva del Garda, Italy, 3–7 June 2018. View Full-Text
Keywords: 4D modeling; cultural heritage; data fusion; monitoring; visualization 4D modeling; cultural heritage; data fusion; monitoring; visualization

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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.; Guerra Campo, Á.; Muñoz-Nieto, Á.L.; Sánchez-Aparicio, L.J.; González-Aguilera, D. Diachronic Reconstruction and Visualization of Lost Cultural Heritage Sites. ISPRS Int. J. Geo-Inf. 2019, 8, 61.

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