Classificação supervisionada aprimorada para mapeamento da floresta de mangue a partir de imagens de satélite Landsat 8
Resumo
O monitoramento das florestas de manguezais é essencial para uma compreensão mais aprofundada do cenário ecológico e da necessidade de conservação desses ecossistemas. Utilizando imagens de satélite de acesso livre, como as do sensor Landsat 8, esta pesquisa buscou mapear a extensão das florestas de manguezais em uma resolução de 30 metros no estuário do rio Macuse localizado no centro de Mocambique. O diferencial deste estudo está no uso de diferentes índices espectrais, como o NDVI, NDWI e o mais recente índice de vegetação de manguezais, o MVI (Mangrove Vegetation Index). Essa abordagem possibilitou através da classificação supervisionada random forest, a separação eficiente da vegetação de manguezais em relação a outras classes de cobertura do solo, alcançando uma precisão notável de 95%, conforme indicado pelo coeficiente kappa.
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Revista Brasileira de Sensoriamento Remoto | ISSN: 2675-5491
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