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Fire frequency analysis in Portugal (1975-2005), using Landsat-based burnt area maps

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Fig. 1. (a) Location of Portugal in Europe and (b) CORINE 2006 land use and cover map (Caetano et al
Fig. 2. Number of fires (grey) and burnt area (black) in mainland Portugal between 1975 and 2005.
Fig. 3. Comparison of parameters c and b influence on the mean (MeFI), median (MdFI) and modal fire intervals (MoFI), to assess the effect of minimum mapping unit (a–f ), time series length (g–l) and single-censored observations (m–u)
Fig. 5 shows a classification of the 21 forest planning regions into four groups. Segmentation thresholds (low–high) were defined on the basis of parameters c and b mean values for the 21 regions (1.3 for c and 107.8 for b)
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