Integrating field data with high spatial resolution multispectral satellite imagery for calibration and validation of coral reef benthic community maps

Roelfsema, Chris and Phinn, Stuart (2010) Integrating field data with high spatial resolution multispectral satellite imagery for calibration and validation of coral reef benthic community maps. Journal of Applied Remote Sensing, 4 1: 043527.1-043527.28. doi:10.1117/1.3430107

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Author Roelfsema, Chris
Phinn, Stuart
Title Integrating field data with high spatial resolution multispectral satellite imagery for calibration and validation of coral reef benthic community maps
Journal name Journal of Applied Remote Sensing   Check publisher's open access policy
ISSN 1931-3195
Publication date 2010-04-01
Sub-type Article (original research)
DOI 10.1117/1.3430107
Open Access Status File (Publisher version)
Volume 4
Issue 1
Start page 043527.1
End page 043527.28
Total pages 28
Place of publication Bellingham, WA, United States
Publisher SPIE - International Society for Optical Engineering
Language eng
Abstract Our ability to map coral reef environments using remote sensing has increased through improved access to: satellite images and field survey data at suitable spatial scales, and software enabling the integration of data sources. These data sets can be used to provide validated maps to support science and management decisions. The objective of this paper was to compare two methods for calibrating and validating maps of coral reef benthic communities derived from satellite images captured over a variety of Coral Reefs The two methods for collecting georeferenced benthic field data were: 1), georeferenced photo transects and 2), spot checks. Quickbird imagery was acquired for three Fijian coral reef environments in: Suva, Navakavu and Solo. These environments had variable water clarity and spatial complexity of benthic cover composition. The two field data sets at each reef were each split, and half were used for training data sets for supervised classifications, and the other half for accuracy assessment. This resulted in two maps of benthic communities with associated mapping accuracies, production times and costs for each study-site. Analyses of the spatial patterns in benthic community maps and their Overall and Tau accuracies revealed that for spatially complex habitats, the maps produced from photo transect data were twice as accurate as spot check based maps. In the context of the reefs examined, our results showed that the photo- transect method was a robust procedure which could be used in a range of coral reef environments to map the benthic communities accurately. In contrast, the spot check method is a fast and low cost approach, suitable for mapping benthic communities which have lower spatial complexity. Our findings will enable scientists, technicians and managers to select appropriate methods for collecting field data to integrate with high spatial resolution multi-spectral imagery to create validated coral reef benthic community maps. © 2010 Society of Photo-Optical Instrumentation Engineers
Keyword Coral reefs
Photo transects
Spot check
Coral-seagrass community maps
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Article number 043527, pp. 1-28

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Geography, Planning and Environmental Management Publications
Official 2011 Collection
ERA 2012 Admin Only
 
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Created: Sun, 13 Feb 2011, 10:03:12 EST