Isibat: A Web and Wireless Application for Collecting Urban Data about Seismic Risk
In the field of seismic risk, conducting an inventory in a urban area is one of the main challenging tasks, considering the large number and the heterogeneity of the buildings and constructions to be studied in every city. In this paper, we present Isibat
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enoble Computer Science Laboratory (LIG), STeamer Research Team, 681, rue de la Passerelle 38402 Saint Martin d’Hères, France {davoine,poulenard,gensel}@imag.fr 2 Earth Sciences Institute & IFSTTAR, Risques Research Team, Rue de la Chimie, 38402 Saint Martin d’Hères, France [email protected]
Abstract. In the field of seismic risk, conducting an inventory in a urban area is one of the main challenging tasks, considering the large number and the heterogeneity of the buildings and constructions to be studied in every city. In this paper, we present Isibat, a client-server application, which makes use of both wireless networks and technologies and Geoweb software for collecting, analysing and visualizing seismic data. On the client side, through an iPhone application, mobile users moving on the field are invited through screens, menus and maps, to collect data that are used to evaluate either the vulnerability of the surrounding buildings (in a pre-seismic phase) or the damage caused (in a post-seismic phase). On the server side, data are stored but also can be queried and visualized through adapted vulnerability or damage maps. Keywords: client-server application, geoweb, mobile software, seismic risks, citizen seismology.
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Introduction
Urban seismic vulnerability is characterized by the ability that buildings and built structures show to resist and stand up to seismic shakings and aftershocks. Many works have shown that there is a strong correlation between the features of buildings, structures and constructions (nature of materials, shape of the roof, number of floors, building irregularities, etc.) and the level of damage at a given level of seismic stress [12], [2], [4]. Having a good knowledge of the urban environment, and especially the existing buildings, is very important in order to manage, foretell, and assess both their pre-seismic vulnerability and their post-seismic integrity. Through the past, various methods for estimating the seismic vulnerability of buildings have been proposed (HAZUS 19971) [5], [11], that have led to the establishment of a global programme ∗ 1
This research is funded by the French National Research Agency – ANR-09-Risk-009. http://www.fema.gou/hazus
D. Pfoser and K.-J. Li (Eds.): W2GIS 2014, LNCS 8470, pp. 134–147, 2014. © Springer-Verlag Berlin Heidelberg 2014
Isibat: A Web and Wireless Application for Collecting Urban Data about Seismic Risk
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for reflection on seismic vulnerability, at worldwide scale (Global Earthquake Model, GEM). However, since urban spaces are vast and heterogeneous, one of the challenges to be addressed here is to collect a sufficient amount of urban data about seismic risk, at different levels of detail, in order to perform some relevant analysis. Indeed, designing and developing methods and tools that allow for an inventory of the buildings in a city, in order to get detailed and useful data about constructions and buildings, is an important challenge in the field of seismic risk prevention. Nowadays, wireless networks, mobiles te
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