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International Journal of Wildland Fire International Journal of Wildland Fire Society
Journal of the International Association of Wildland Fire
RESEARCH ARTICLE

Optimisation of tower site locations for camera-based wildfire detection systems

Andries Heyns https://orcid.org/0000-0001-8187-9640 A B C H , Warren du Plessis https://orcid.org/0000-0003-4265-614X C , Michael Kosch https://orcid.org/0000-0003-2846-3915 D E F G and Gavin Hough G
+ Author Affiliations
- Author Affiliations

A Department of Science and Technology-National Research Foundation (DST-NRF) Centre of Excellence in Mathematical and Statistical Sciences (CoE-MaSS), Private Bag 3, Wits 2050, Johannesburg, South Africa.

B Laboratory for Location Science, Department of Geography, University of Alabama, Tuscaloosa, AL 35487, USA.

C University of Pretoria, Lynnwood Road, Pretoria, 0002, South Africa.

D South African National Space Agency, Hospital Street, Hermanus, 7200, South Africa.

E Department of Physics, Lancaster University, Lancaster LA1 4YW, UK.

F University of Western Cape, Robert Sobukwe Road, Bellville, Cape Town, 7535, South Africa.

G EnviroVision Solutions, PO Box 1535, Westville, Durban, 3630, South Africa.

H Corresponding author. Email: andriesheyns@gmail.com

International Journal of Wildland Fire 28(9) 651-665 https://doi.org/10.1071/WF18196
Submitted: 26 November 2018  Accepted: 10 July 2019   Published: 20 August 2019

Abstract

Early forest fire detection can effectively be achieved by systems of specialised tower-mounted cameras. With the aim of maximising system visibility of smoke above a prescribed region, the process of selecting multiple tower sites from a large number of potential site locations is a complex combinatorial optimisation problem. Historically, these systems have been planned by foresters and locals with intimate knowledge of the terrain rather than by computational optimisation tools. When entering vast new territories, however, such knowledge and expertise may not be available to system planners. A tower site-selection optimisation framework that may be used in such circumstances is described in this paper. Metaheuristics are used to determine candidate site layouts for an area in the Nelspruit region in South Africa currently monitored by the ForestWatch detection system. Visibility cover superior to that of the existing system in the region is achieved and obtained in several days, whereas traditional approaches normally require months of speculation and planning. Following the results presented here, the optimisation framework is earmarked for use in future ForestWatch system planning.

Additional keywords: facility location, maximal cover, NSGA-II.


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