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Classification of Antarctic surfaces using AVHRR data: a multispectral approach

Published online by Cambridge University Press:  14 May 2004

Giuseppe Zibordi  and
G. Paolo Meloni
Giuseppe Zibordi
Affiliation:
Institute for the Study of Geophysical and Environmental Methodologies, National Research Council, Via Emilia Est 770, 41100 Modena, Italy
G. Paolo Meloni
Affiliation:
Institute for the Study of Geophysical and Environmental Methodologies, National Research Council, Via Emilia Est 770, 41100 Modena, Italy
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Abstract

The mapping of sea, landice, sea ice and clouds, from Advanced Very High Resolution Radiometer (AVHRR) images taken over Antarctica in daylight is investigated and a classification scheme is proposed on the basis of thresholds retrieved from multispectral patterns of representative data. The scheme, which can be used for real time analysis of AVHRR images in scientific and logistic activities, gives satisfactory separation of different categories. Major misclassification occurs between ice clouds and land ice because of their very similar spectral signature in the AVHRR channels. Comparison of classified samples, obtained from visual inspection of images and from application of the scheme, exhibits a confusion matrix with accuracy A=92% over areas almost free from ice clouds.

Keywords

Advanced Very High Resolution Radiometercloudsland iceremote sensingsea ice
Type
Papers—Atmospheric Sciences
Information
Antarctic Science , Volume 3 , Issue 3 , September 1991 , pp. 333 - 338
Copyright
© Antarctic Science Ltd 1991

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