Monitoring the sea breaking zone in northwest Portugal using Earth observation satellites

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2005

Autores

Marcal, ARS (Autor) FCUP; Teodoro, AC (Autor) FCUP; Castro, L (Autor) Outra; Gomes, FV (Autor) Outra; Nunes, AL (Autor) Outra

Ata de Conferência Internacional

Título: NEW STRATEGIES FOR EUROPEAN REMOTE SENSING

Páginas: 301-308

24th Symposium of the European-Association-of-Remote-Sensing-Laboratories (EARSeL)

Dubrovnik, CROATIA, MAY 25-27, 2004

Indexação

ISI Web of Knowledge - 0 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia do ambiente

Outras Informações

ID Authenticus: P-000-6BN

Abstract (EN): The coastline of Portugal is periodically surveyed by aircraft and the photographs acquired, usually at 1:8000 scale, are used for coastal protection studies. The air photo surveys are expensive and there would be great benefits if they could be replaced by processed images from Earth Observation Satellites. This paper presents the results of an ongoing project, which aims to evaluate the applicability of passive satellite images for coastal protection studies. Images from Landsat TM, SPOT HRVIR and ASTER were used. The initial visual inspection of these images was very encouraging. Two lines of work are currently being pursued - a quantitative and an image exploration approach. The first attempts to estimate the amount of sediments present in the various areas around the sea-breaking zone, by calibrating and atmospherically correcting the satellite images, and to use an established relationship between the amount of suspended sediments and the seawater reflectance. The second approach is to use unsupervised classification and data clustering algorithms to automatically identify different areas in the sea-breaking zone. The current status of each line of work is described and the plans for future work discussed.

Idioma: Inglês

Tipo (Avaliação Docente): Científica