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Mapping wildfire occurrence at regional scale / J. De La Riva in Remote sensing of environment, vol 92 n° 3 (30 August 2004)  

Public [article]  inRemote sensing of environment > vol 92 n° 3 (30 August 2004) . - pp 363 - 369 Titre : Mapping wildfire occurrence at regional scale Type de document : Article/Communication Auteurs : J. De La Riva, Auteur ; F. Perez-Cabello, Auteur ; et al., Auteur Année de publication : 2004 Article en page(s) : pp 363 - 369 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale [Termes IGN] analyse diachronique [Termes IGN] cartographie automatique [Termes IGN] données maillées [Termes IGN] estimation par noyau [Termes IGN] incendie de forêt [Termes IGN] interpolation [Termes IGN] reconnaissance de surface Résumé : (Auteur) When assessing fire danger, interpolation of the dependent variable-historic fire occurrence-is required in order to statistically compare and analyze it with human factors, environmental parameters and census statistics. To confirm the compatibility between the distinct data types, occasionally, for this kind of spatial analysis, historical observations of the primary wildland fire (given as x and y coordinates) must be transformed either to continuous surfaces or to area data. The simple overlay approach converts single point observations to area data. However, this procedure assumes lack of spatial uncertainties that would otherwise result in serious errors caused by the positional inaccuracies of the original point observations. Here, we used kernel density interpolation to convert the original data on wildland fire ignition into an expression of areal units, defined by a raster grid and, subsequently, by the administrative borders of the municipalities in two study areas in Spain. By overlaying a normal bivariate probability density function (kernel) over each point observation, each ignition point was considered an uncertain point location rather than an exact one. Numéro de notice : A2004-385 Affiliation des auteurs : non IGN Thématique : FORET/GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2004.06.022 En ligne : https://doi.org/10.1016/j.rse.2004.06.022 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26912 [article]