Enhanced change detection index for disaster response, recovery assessment and monitoring of accessibility and open spaces (camp sites)

de Alwis Pitts, Dilkushi A. and So, Emily (2017) Enhanced change detection index for disaster response, recovery assessment and monitoring of accessibility and open spaces (camp sites). International Journal of Applied Earth Observation and Geoinformation, 57 . pp. 49-60. ISSN 0303-2434

Full content URL: http://doi.org/10.1016/j.jag.2016.12.004

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Enhanced change detection index for disaster response, recovery assessment and monitoring of accessibility and open spaces (camp sites)

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Abstract

tThe availability of Very High Resolution (VHR) optical sensors and a growing image archive that is fre-quently updated, allows the use of change detection in post-disaster recovery and monitoring for robustand rapid results. The proposed semi-automated GIS object-based method uses readily available pre-disaster GIS data and adds existing knowledge into the processing to enhance change detection. It also allows targeting specific types of changes pertaining to similar man-made objects. This change detection method is based on pre/post normalized index, gradient of intensity, texture and edge similarity filters within the object and a set of training data. Once the change is quantified, based on training data, the method can be used automatically to detect change in order to observe recovery over time in large areas.Analysis over time can also contribute to obtaining a full picture of the recovery and development after disaster, thereby giving managers a better understanding of productive management practices.

Keywords:Change detection, Remote sensing, Disaster response and recovery, Roads, Open spaces
Subjects:F Physical Sciences > F640 Earth Science
K Architecture, Building and Planning > K460 Transport Planning
F Physical Sciences > F832 Remote Sensing
Divisions:College of Science > School of Geography
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ID Code:29554
Deposited On:26 Nov 2017 11:56

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