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Author (up) Sidgley Camargo de Andrade; João Porto de Albuquerque; Alexandre Cláudio Botazzo Delbem pdf  isbn
  Title Improving the credibility of unreliable information through static images and data mining: an experimental study to identify floods Type Conference Article
  Year 2016 Publication ISCRAM 2016 Conference Proceedings 13th International Conference on Information Systems for Crisis Response and Management Abbreviated Journal ISCRAM 2016  
  Volume Issue Pages  
  Abstract Affected locations by flash floods are rich in information for flood management. Usually, there are several types and sources of information which can be related to achieve better reliability to decision-making. However, a major challenge is to achieve the reliability this information within datasets so heterogeneous or complex. For instance, reports of Volunteered Geographic Information (VGI) through a crowdsourcing-based platform can be confirmed by means of images available on site. Thus, we carried out an experiment to identify water level of river through clustering from static images using an evolutionary method of hierarchical data clustering, called DAta-MIning COde REpositories (Sanches, Cardoso, and Delbem, 2011). Our experiment aimed answering the following question: Is DAMICORE able to find matching clusters between static images gathered from the sensor in-situ and water levels provided by the non-automatic interpretation mechanisms in the riverbed? These mechanisms (Figure 1 (a) water level ruler, (b) puppet, and (c) multi-color band) refer to the hazard index at hydrology field and help volunteers to report into the crowdsourcing-based platform (Degrossi, Albuquerque, Fava, Mendiondo, 2014). Moreover, our dataset contains 288 images categorized in (gray) 124 undefined, (orange) 109 acceptable, (red) 17 high, (dark red) 6 very high, and (blue) 32 flood which were obtained from in-situ sensor in a 5-minute temporal resolution on November 23rd, 2015, when a flash flood occurred at 4 p.m. (Figure 1 (d) ) at São Carlos, São Paulo, Brazil. Our preliminaries results have shown a possible matching between clusters found (Figure 2) and interpretation mechanisms of the water level in the riverbed. Therefore, there is evidence that the DAMICORE can support VGI reports collected from dedicated platforms, improving the credibility of information. Nevertheless, further experiments should be performed considering a greater number of images per category and matching between other types of VGI and authoritative data, e.g. social media and sensor.  
  Corporate Author Thesis  
  Publisher Federal University of Rio de Janeiro Place of Publication Rio de Janeiro, Brasil Editor A. Tapia; P. Antunes; V.A. Bañuls; K. Moore; J. Porto  
  Language English Summary Language English Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 2411-3388 ISBN 978-84-608-7984-9 Medium  
  Track Poster Session Expedition Conference 13th International Conference on Information Systems for Crisis Response and Management  
  Notes Approved no  
  Call Number Serial 1428  
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