Abordagem analítica e sequencial para a classificação de ortofotos para o mapeamento de mosaico de Floresta e Campo no Parque Estadual de Campos do Jordão
Maps of the Araucaria Forest and Grassland mosaics, a typical landscape of Ombrophilous Mixed Forests in Brazilian south and southeastern regions are fundamental to understand its spatial and temporal dynamics. This work describes a reproducible analytical method for imaging processing and classification for the production of land cover map in such landscape for comparisons among different sites and dates. The work was conducted in Campos do Jordão State Park, São Paulo State, Brazil, which was created in 1941 to protect remnants of Araucaria Forest in the southeastern region of the country. The classification method comprises of nested region based classifications of orthorectified digital aerial photographs applied sequentially on band ratio and simple spectral bands. Classes that presented ambiguities in the classification of the band ratio were refined with further classifications of simple spectral band. The results showed that the methodology generated a good representation of the vegetation cover in a representative sample of the Campos do Jordão State Park landscape. The comparison of the Land Cover Map produced in this work with a previous one produced in 1975 showed consistence in the representation of landscape features that demonstrated stability in vegetation cover which emphasizes the role of this conservation unit for Araucaria Forest preservation. Evidences of forest encroachment over grassland were identified as well as forest degradation.Pages: 2905-291
