Marine & Environmental Sciences Faculty Articles
Integrating In Situ Reef-Top Reflectance Spectra with Landsat TM Imagery to Aid Shallow-Tropical Benthic Habitat Mapping
ResearcherID
B-8552-2013
Document Type
Article
Publication Title
Coral Reefs
ISSN
0722-4028
Publication Date
4-2004
Keywords
In situ spectra, Landsat, Radiative transfer, Classification, Red sea, Habitat mapping
Abstract
This manuscript presents the use of hyperspectral in situ reflectance measurements evaluated above the water surface to train a supervised classification of a simultaneously acquired Landsat 5 TM image. The optical signature of a submerged reef substrate is both attenuated and augmented by the presence of the atmosphere and intervening water column, thereby complicating the link between field and space-borne measurement. The motivation of this manuscript is to quantify the advantage (defined as increase in classification accuracy) conferred by each of five levels of increasingly complex image processing methods to correct for atmospheric and submergence effects. It is found that the maximum overall classification accuracy attained in areas of the image where water depth is unknown was 53%, but with the addition of depth information, accuracy increases to 76%. The results demonstrate the ability of a classifier trained solely by in situ optical measurements to accurately resolve the broad substrate types of a typical Red Sea fringing reef top. Although slightly different accuracy assessment protocols were used, the results also suggest that using in situ spectra for training provided better classification results than using from-image statistics.
DOI
10.1007/s00338-003-0351-0
Volume
23
Issue
1
First Page
5
Last Page
20
NSUWorks Citation
Samuel J. Purkis and R. Pasterkamp. 2004. Integrating In Situ Reef-Top Reflectance Spectra with Landsat TM Imagery to Aid Shallow-Tropical Benthic Habitat Mapping .Coral Reefs , (1) : 5 -20. https://nsuworks.nova.edu/occ_facarticles/244.
Comments
©Springer-Verlag 2003