Technical Note: Hyperspherical direction cosine transformation of remotely sensed data for separation of topographic expression of land use classification |
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| Authors: | M. L. Nirala G. Venkatachalam |
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| Affiliation: | 1. Department of Applied Physics &2. Electronics and Mechanical Engineering , University of Dundee , Dundee, Scotland, DD1 4HN, UK;3. Department of Civil Engineering , Indian Institute of Technology , Powai, Bombay, 400 076, India |
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| Abstract: | In this paper, the hyperspherical direction cosine transformation process of remotely-sensed data is explained. In particular, this transformation process is utilized to examine various land use and land cover classes in the Bombay suburban and Thana district area in India. A statistical approach to determine the transformed components and other statistical variables on different band combinations is discussed. The results are analysed, and the best possible combinations selected for accurate classification are presented. Separation of topographically induced illumination effects and spectral information (cover type) in digital scanner data can be accomplished by projecting measurement vectors on to a hypersphere. |
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