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Article

Post-Earthquake Recovery Phase Monitoring and Mapping Based on UAS Data

1
Department of Geography, University of the Aegean, 81100 Mytilene, Greece
2
Department of Cultural Technology and Communication, University of the Aegean, 81100 Mytilene, Greece
3
Department of Environmental Studies, University of the Aegean, 81100 Mytilene, Greece
*
Author to whom correspondence should be addressed.
ISPRS Int. J. Geo-Inf. 2020, 9(7), 447; https://0-doi-org.brum.beds.ac.uk/10.3390/ijgi9070447
Received: 15 June 2020 / Revised: 10 July 2020 / Accepted: 15 July 2020 / Published: 17 July 2020
(This article belongs to the Special Issue Geomatics and Geo-Information in Earthquake Studies)
Geoinformatics plays an essential role during the recovery phase of a post-earthquake situation. The aim of this paper is to present the methodology followed and the results obtained by the utilization of Unmanned Aircraft Systems (UASs) 4K-video footage processing and the automation of geo-information methods targeted at both monitoring the demolition process and mapping the demolished buildings. The field campaigns took place on the traditional settlement of Vrisa (Lesvos, Greece), which was heavily damaged by a strong earthquake (Mw=6.3) on June 12th, 2017. For this purpose, a flight campaign took place on 3rd February 2019 for collecting aerial 4K video footage using an Unmanned Aircraft. The Structure from Motion (SfM) method was applied on frames which derived from the 4K video footage, for producing accurate and very detailed 3D point clouds, as well as the Digital Surface Model (DSM) of the building stock of the Vrisa traditional settlement, twenty months after the earthquake. This dataset has been compared with the corresponding one which derived from 25th July 2017, a few days after the earthquake. Two algorithms have been developed for detecting the demolished buildings of the affected area, based on the DSMs and 3D point clouds, correspondingly. The results obtained have been tested through field studies and demonstrate that this methodology is feasible and effective in building demolition detection, giving very accurate results (97%) and, in parallel, is easily applicable and suit well for rapid demolition mapping during the recovery phase of a post-earthquake scenario. The significant advantage of the proposed methodology is its ability to provide reliable results in a very low cost and time-efficient way and to serve all stakeholders and national and local organizations that are responsible for post-earthquake management. View Full-Text
Keywords: 3D change mapping; building demolition; post-earthquake management; 4K video; UAS 3D change mapping; building demolition; post-earthquake management; 4K video; UAS
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MDPI and ACS Style

Soulakellis, N.; Vasilakos, C.; Chatzistamatis, S.; Kavroudakis, D.; Tataris, G.; Papadopoulou, E.-E.; Papakonstantinou, A.; Roussou, O.; Kontos, T. Post-Earthquake Recovery Phase Monitoring and Mapping Based on UAS Data. ISPRS Int. J. Geo-Inf. 2020, 9, 447. https://0-doi-org.brum.beds.ac.uk/10.3390/ijgi9070447

AMA Style

Soulakellis N, Vasilakos C, Chatzistamatis S, Kavroudakis D, Tataris G, Papadopoulou E-E, Papakonstantinou A, Roussou O, Kontos T. Post-Earthquake Recovery Phase Monitoring and Mapping Based on UAS Data. ISPRS International Journal of Geo-Information. 2020; 9(7):447. https://0-doi-org.brum.beds.ac.uk/10.3390/ijgi9070447

Chicago/Turabian Style

Soulakellis, Nikolaos, Christos Vasilakos, Stamatis Chatzistamatis, Dimitris Kavroudakis, Georgios Tataris, Ermioni-Eirini Papadopoulou, Apostolos Papakonstantinou, Olga Roussou, and Themistoklis Kontos. 2020. "Post-Earthquake Recovery Phase Monitoring and Mapping Based on UAS Data" ISPRS International Journal of Geo-Information 9, no. 7: 447. https://0-doi-org.brum.beds.ac.uk/10.3390/ijgi9070447

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