Avaliação de imagens QUICKBIRD na análise geográfica de um setor da Mata Atlântica do Rio Grande do Sul / Geographic analysis of a Mata Atlântica site in Rio Grande do Sul state - Brazil using QUICKBIRD imagery.

AUTOR(ES)
DATA DE PUBLICAÇÃO

2003

RESUMO

In 1994, the Center for Research and Nature Conservation (PRÓ-MATA) was created, looking forward to develop studies and actions for the protection and recovery of the ecosystems from a sector of "Mata Atlântica" in Rio Grande do Sul, Brazil. PRÓ-MATA was conceived from the cooperation between the Catholic University of Rio Grande do Sul (PUCRS - Pontifícia Universidade Católica do Rio Grande do Sul) and University of Tübingen (Germany). The objective of this study is to execute studies on the physical environment of the PRÓ-MATA area, using data of satellite QUICKBIRD. The main steps of the work were: creation of the DEM, geometrical correction of imagery, mapping of hydrology, geomorphology and land use/land cover, evaluate the exactness of the land use/land cover map, and geographical analysis of the data. Two field surveys were done in order to obtain information of ground truth, and to get control points. In order to correct the images we used the Rational Functional Model. The hydrologic and geomorphologic maps were done by visual interpretation. At the land use/land cover map, object oriented classification was tested. The final map of land use/land cover was created by visual interpretation. The geographic analysis allowed the identification of permanent preservation areas, transition zones and those areas susceptible to human action. A Geographic Data Bank was created for the PRÓ-MATA area. The results demonstrated that the QUICKBIRD images are perfectly usable for this study.

ASSUNTO(S)

mata atlântica sistemas de informação geográfica (sig) geographic information systems (gis) rio grande do sul (rs). key word: remote sensing sensoriamento remoto alta resolução análise espacial spacial analysis rio grande do sul (rs) high resolution mata atlântica

ACESSO AO ARTIGO

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