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Remote Sens. 2009, 1(4), 842-857; doi:10.3390/rs1040842

Derivation of Soil Line Influence on Two-Band Vegetation Indices and Vegetation Isolines

1,* , 2
1 Department of Information Science and Technology, Aichi Prefectural University, 1522-3 Kumabari, Nagakute, Aichi 480-1198, Japan 2 Department of Natural Resources and Environmental Management, College of Tropical Agriculture and Human Resources, University of Hawaii at Manoa, 1910 East-West Road, Honolulu, HI 96822, USA 3 Department of Soil Science, University of São Paulo, Av. Pádua Dias, 11, Piracicaba, São Paulo, Brazil 4 Natural Resources Conservation Service, USDA, 355 East Hancock Avenue, Athens, GA 30601, USA 5 Department of Soil, Water and Environmental Science, University of Arizona, 1177 East Fourth Street, Tucson, AZ 85721, USA
* Author to whom correspondence should be addressed.
Received: 3 September 2009 / Revised: 16 October 2009 / Accepted: 27 October 2009 / Published: 3 November 2009
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This paper introduces derivations of soil line influences on two-band vegetation indices (VIs) and vegetation isolines in the red and near infra-red reflectance space. Soil line variations are described as changes in the soil line parameters (slope and offset) and the red reflectance of the soil surface. A general form of a VI model equation written as a ratio of two linear functions (e.g., NDVI and SAVI) was assumed. It was found that relative VI variations can be approximated by a linear combination of the three soil parameters. The derived expressions imply the possibility of estimating and correcting for soil-induced bias errors in VIs and their derived biophysical parameters, caused by the assumption of a general soil line, through the use of external data sources such as regional soil maps.
Keywords: spectral vegetation index; soil noise; soil line; vegetation isoline spectral vegetation index; soil noise; soil line; vegetation isoline
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Yoshioka, H.; Miura, T.; Demattê, J.A.M.; Batchily, K.; Huete, A.R. Derivation of Soil Line Influence on Two-Band Vegetation Indices and Vegetation Isolines. Remote Sens. 2009, 1, 842-857.

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