Imaging Spectroscopy And Integrated Coastal
Zone Management: A Promising Marriage
Author(s)
B. Deronde, S. Sterckx, L. Bertels, E. Knaeps & P. Kempeneers
Abstract
This paper provides an overview of the coastal and marine applications which
make use of Imaging Spectroscopy (IS), recently under development in Vito. It
should be considered as a concise overview rather than an in depth presentation
of one application or development. The first two applications focus on sediment
mapping; firstly, a classification of sediment habitat types of the Molenplaat, a
tidal sand bank in the Westerschelde, is presented. By means of feature selection
and a supervised binary classification approach the sediment is classified
according to its grain size, moisture content, organic matter content and
chlorophyll-a concentration. The second application uses airborne IS to classify
the different sand types present along the Belgian coast, in combination with
airborne laserscanning to derive accurate erosion maps. The combination of both
data products results in a method which proves to be very suited to monitoring
the sand transport processes along the Belgian coast. Afterwards two aquatic
applications are presented; in the first, coral reef communities in Indonesia are
classified. Extensive field work served to collect a spectral library which is used
to classify the coral reef communities in as much detail and as accurately as
possible. The second aquatic application addresses the difficult challenge of
quantifying the amount of suspended sediment and chlorophyll-a in water and
rivers; this is performed by inversion of a bio-optical model using a set of
Specific Inherent Optical Properties (SIOP’s) measured in-situ. Many marine
applications ask for some specific processing steps which are inherent to the
aquatic environment. Therefore the last study in this overview focuses on the
atmospheric correction above water bodies. Due to the high absorption and
transmission of water bodies the reflected radiation level is low compared to
land. To extract this small signal from a much greater base of other radiance a
very accurate atmospheric correction algorithm is required. Therefore a specific
atmospheric correction algorithm, WATCOR, has been developed to account for
the marine atmospheric conditions as well as for the air-water interface.
Keywords
Related Book
Other papers in this volume
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