Monitoramento do desmatamento no bioma Cerrado: Novas perspectivas de detecção

Brazil has cataloged more than 40,000 species of flora, and 30% of these species are located in the Cerrado biome. The Cerrado biome has only 8.6% of its area protected by Conservation Units (UC), and only 3.1% are Integral Protection (IP). Thus, the objective of this analysis is to evaluate the spatial-temporal dynamics of deforestation of the natural vegetation, by means of SIAD Cerrado and Global Forest Change (GFC) mappings, as well as to evaluate the accuracy of the global data for the savanna environment, which has the seasonality very marked in its seasons. The analysis of spatial-temporal dynamics of deforestation based on the SIAD and GFC mappings in the Cerrado was done between 2002 and 2014, while to evaluate the spatial accuracy of the GFC data, 5 random Landsat 8 scenes were selected from 121 scenes, for the year of 2014, scenes 219/72 (MG), 220/64 (MA), 220/66 (PI), 222/68 (TO) and 226/69 (MT), for which 633 polygons were inspected. SIAD, between 2002 and 2014, mapped 3.3 Mha of deforestation more than GFC, 6,415,550 ha and 3,263,824 ha, respectively. Although the SIAD Cerrado has mapped 196% more deforested areas than the GFC, the correlation between the data is high, that is, 87%. The spatial evaluation of GFC data for the Cerrado had an average accuracy of 60%, once 67% and 32% of the positive deforestation, identified by the GFC, occurred on savanna and forest formations, respectively.