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

作者：Yoshioka Hiroki^*; Miura Tomoaki; Dematte Jose A M; Batchily Karim; Huete Alfredo R

来源：Remote Sensing, 2009, 1(4): 842-857.

DOI：10.3390/rs1040842

• spectral vegetation index
• soil noise
• soil line
• vegetation isoline

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.

• 出版日期2009-12