1. Location of Bare Soil Surface and Soil Line on the RED-NIR Spectral Plane.
- Author
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Koroleva, P. V., Rukhovich, D. I., Rukhovich, A. D., Rukhovich, D. D., Kulyanitsa, A. L., Trubnikov, A. V., Kalinina, N. V., and Simakova, M. S.
- Subjects
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VEGETABLE gardening , *LANDSAT satellites , *DIGITAL soil mapping , *URBAN soils , *SOIL porosity - Abstract
Soil as a separate natural body occupies certain area with its own set of spectral characteristics within the RED-NIR spectral space. This is an ellipse-shaped area, and its semi-major axis is the soil line for a satellite image. The spectral area for a bare soil surface is neighboring to the areas of black carbon, straw, vegetating plants, and missing RED-NIR values. A reliable separation of the bare soil surface within the spectral space is possible with the technology of spectral neighborhood of soil line. The accuracy of this method is 90%. The determination of the bare soil surface using vegetation indices, both relative (NDVI), and perpendicular (PVI), is incorrect; the accuracy of these methods does not exceed 65%, and for most of the survey seasons it may be lower than 50%. The flat part of the "tasseled cap" described as the soil line, is not a synonym for the area of the bare soil surface. The bare soil surface on the RED-NIR plots occupies significantly smaller areas than the area of soil line according to Kauth and Thomas. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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