Abstract: 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.
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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.
Yoshioka H, Miura T, Demattê JAM, Batchily K, Huete AR. Derivation of Soil Line Influence on Two-Band Vegetation Indices and Vegetation Isolines. Remote Sensing. 2009; 1(4):842-857.
Yoshioka, Hiroki; Miura, Tomoaki; Demattê, José A. M.; Batchily, Karim; Huete, Alfredo R. 2009. "Derivation of Soil Line Influence on Two-Band Vegetation Indices and Vegetation Isolines." Remote Sens. 1, no. 4: 842-857.