DocumentCode :
2669603
Title :
Integrating dual frequency side scan sonar and high spatial resolution satellite imagery for monitoring coral reef benthic communities
Author :
Karpouzli, Evanthia ; Malthus, Tim J.
Author_Institution :
Univ. of Edinburgh, Edinburgh
fYear :
2007
fDate :
23-28 July 2007
Firstpage :
1730
Lastpage :
1733
Abstract :
In this study, the characteristics of both optical and acoustic data types were compared to determine if synergistic use of both methods improved the accuracy of classification of benthic reefs and associated habitats. IKONOS imagery and dual frequency side scan sonar data were acquired in the western Caribbean encompassing coral, seagrass, algal and sediment habitats. Both data types were analysed in isolation and in combination at both habitat and community classification levels. The accuracies achieved with the combined dataset (61% and 52% for the coarse and medium classification levels, respectively) were significantly higher than what was achieved on the basis of the two datasets used in isolation, demonstrating the synergy of the acoustic and optical datasets. The greater accuracy improvements were attributed to the higher spatial resolution of the sonar data, its greater depth penetration, and information contained in the sonograms regarding structural organisation of the habitats. Misclassifications using the combined datasets could be attributed to spectral and textural similarities between different classes, quantity and classification of the ground truth sites, and uncertainties in the co-registration of the two datasets.
Keywords :
image classification; oceanography; remote sensing; sediments; sonar; IKONOS imagery; acoustic data type; algal; benthic reefs classification; coral reef benthic communities monitoring; high spatial resolution satellite imagery; optical data type; seagrass; sediment habitats; side scan sonar; sonograms; structural organisation; western Caribbean; Biomedical optical imaging; Frequency; Integrated optics; Monitoring; Optical attenuators; Optical sensors; Remote sensing; Satellites; Sonar; Spatial resolution; IKONOS; biotope mapping; classification; coral reefs; seagrass; side scan sonar;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Geoscience and Remote Sensing Symposium, 2007. IGARSS 2007. IEEE International
Conference_Location :
Barcelona
Print_ISBN :
978-1-4244-1211-2
Electronic_ISBN :
978-1-4244-1212-9
Type :
conf
DOI :
10.1109/IGARSS.2007.4423152
Filename :
4423152
Link To Document :
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