Revisión de la utilización de distintos índices espectrales y técnicas para la cartografía de área quemada en imágenes MODIS

Abstract

In the last decades many techniques and indices have been developed and analysed to accomplish the burned area mapping at regional scale. In this study it has been assessed some of these techniques in the Iberian Peninsula by using MODIS images. It has been stressed the spectral indices and the HIS analysis (Intensity, Hue and Saturation). Besides, it has been applied a supervised classification technique, widely used in hyperspectral images,that has not been used before to map fire-affected area, called «Spectral AngleMapper» (SAM). Regarding the separability analysis, the higher values have been found in Hue component of IHS technique, SAM and the spectral indexes that included the SWIR band in their computation. Finally, the errors calculation and the final burned area cartography have demonstrated the potential of SAM and IHS to perform the burned area mapping. Key Words: spectral indices, MODIS, Spectral Angle Mapper, thresholds.