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Crowdsourced validation and updating of dynamic features in OpenStreetMap an analysis of shelter mapping after the 2015 Nepal earthquake
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Anhorn, Johannes, Herfort, Benjamin and Albuquerque, João Porto de (2016) Crowdsourced validation and updating of dynamic features in OpenStreetMap an analysis of shelter mapping after the 2015 Nepal earthquake. In: 13th International Conference on Information Systems for Crisis Response and Management ISCRAM 2016, Rio de Janeiro, Brazil, 22-25 May 2016. Published in: Proceedings of the ISCRAM 2016 Conference – Rio de Janeiro, Brazil, May 2016
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Official URL: http://www.iscram2016.nce.ufrj.br/
Abstract
The paper presents results from a validation process of OpenStreetMap (OSM) rapid mapping activities using crowdsourcing technology in the aftermath of the Gorkha earthquake 2015 in Nepal. We present a framework and tool to iteratively validate and update OSM objects. Two main objectives are addressed: first, analyzing the accuracy of the volunteered geographic information (VGI) generated by the OSM community; second, investigating the spatio-temporal dynamics of spontaneous shelter camps in Kathmandu. Results from three independent validation iterations show that only 10 % of the OSM objects are false positives (no shelter camps). Unexpectedly, previous mapping experience only had a minor influence on mapping accuracy. The results further show that it is critical to monitor the temporal dynamics. Out of 4,893 identified shelter camps, 54% were already empty/closed six days after the first mapping. So far, updating geographical features during humanitarian crisis is not properly addressed by the existing crowdsourcing approaches.
Item Type: | Conference Item (Paper) | ||||
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Subjects: | Q Science > QA Mathematics > QA76 Electronic computers. Computer science. Computer software | ||||
Divisions: | Faculty of Social Sciences > Centre for Interdisciplinary Methodologies | ||||
Library of Congress Subject Headings (LCSH): | Emergency housing, Geospatial data, Computer software -- Validation | ||||
Journal or Publication Title: | Proceedings of the ISCRAM 2016 Conference – Rio de Janeiro, Brazil, May 2016 | ||||
Official Date: | 2016 | ||||
Dates: |
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Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Date of first compliant deposit: | 25 April 2016 | ||||
Date of first compliant Open Access: | 26 April 2016 | ||||
Funder: | Brazil. Coordenação do Aperfeiçoamento de Pessoal de Nível Superior (CAPES), Universität Heidelberg | ||||
Grant number: | 88887.091744/2014-01 (CAPES) | ||||
Conference Paper Type: | Paper | ||||
Title of Event: | 13th International Conference on Information Systems for Crisis Response and Management ISCRAM 2016 | ||||
Type of Event: | Conference | ||||
Location of Event: | Rio de Janeiro, Brazil | ||||
Date(s) of Event: | 22-25 May 2016 |
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