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Impact des niveaux d’échelle sur l’étude des feux de forèts du sud-est de la France

Citation

Louvet, R and Josselin, D and Genre-Grandpierre, C and Aryal, J, Impact des niveaux d'echelle sur l'etude des feux de forets du sud-est de la France, CEUR Workshop Proceedings: Proceedings of the Spatial Analysis and GEOmatics conference, SAGEO 2015, 23-26 November 2015, Hammamet, Tunisia, pp. 254-268. ISSN 1613-0073 (2016) [Refereed Conference Paper]


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Copyright Statement

Copyright 2015 the authors

Official URL: http://ceur-ws.org/Vol-1535/

DOI: doi:10.3166/rig.2016.00012

Abstract

The Modifiable Areal Unit Problem (MAUP) is a well-known issue related to the influence of the spatial support on statistical observations. It occurs when different spatial units making different spatial partitions are used and when the resulting measures vary according to those partitions. To tackle this issue, we first draw a state of the art. Considering the particular problem of (up)scaling, we propose a method to visualize the sensitivity of the spatial statistics to the support. We test this method on forest fires in Southern France, handling a sample from the Promethée database. From these data, we attempt to find the key explanatory variables. The results show that the correlation coefficient varies significantly, depending on scale, and that we can select variables and scales based on this variability. Then, we propose two different ways to deal with the MAUP: (i) by using geovisualization to assess and to improve the robustness of the correlation analysis and to choose the pertinent information that allows to minimize the sensitivity, (ii) by considering as pertinent the spatial partition which is the farthest one from a random spatial distribution of the independent variable.

Item Details

Item Type:Refereed Conference Paper
Keywords:Modifiable Areal Unit Problem (MAUP), Change Of Support Problem (COSP), forest fire, Prométhée database, R
Research Division:Engineering
Research Group:Geomatic Engineering
Research Field:Photogrammetry and Remote Sensing
Objective Division:Environment
Objective Group:Environmental and Natural Resource Evaluation
Objective Field:Environmental Management Systems
Author:Louvet, R (Mr Romain Louvet)
Author:Aryal, J (Dr Jagannath Aryal)
ID Code:122125
Year Published:2016
Deposited By:Geography and Spatial Science
Deposited On:2017-11-01
Last Modified:2017-11-20
Downloads:0

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