Avaliacao de dados MSS/Landsat para identificacao e delimitacao de manguezais na area de Cananeia-Iguape (Estado de Sao Paulo) / Assessment of data MSS / Landsat for identification and delimitation of mangroves in the area of Cananeia-Iguape (Sao Paulo state)

AUTOR(ES)
DATA DE PUBLICAÇÃO

1985

RESUMO

Mangroves are considered to be responsible for the high biological productivity of coastal enviroments. In spite of their ecological importance, their spatial distribution patterns are poorly known and this fact restricts the effectiveness of management regarding protective measures against devastation by man. The application of satellite remote sensing techniques to the study of these patterns is economically attractive and permits an overall view of extensive areas. This study was made to evaluate the physical distribution of the Cananéia-Iguape mangrove in the southeast Brazilian coast using MSS-LANDSAT digital image processing which were correlated with radar images and aerial pkotographs. A statistical classification using algorithms from the Multispectral Interative Image Analysis System (IMAGE-100) yielded a thematic map, from which 13 units were selected for area estimation. Correlations with radar image and panchromatic aerial photograph area estimation revealed maximum linear correlation coefficients higher than r=0.99, which means that the MSS-LANDSAT data processing system was entirely satisfactory for identification of the general characteristics of mangrove environments.

ASSUNTO(S)

imagens radar integrated environmental studies mangrove manguezais estudos integrados do meio ambiente processamento digital de imagens fotografia aerea satelites landsat i-100 computer multispectral scanning systems sistemas multiespectrais de varredura cananeia (sp) i-100 iguape (sp) image processing

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