Location of Bare Soil Surface and Soil Line on the RED–NIR Spectral Plane
| Autor: | M. S. Simakova, D. I. Rukhovich, N. V. Kalinina, D. D. Rukhovich, A. L. Kulyanitsa, A. D. Rukhovich, A. V. Trubnikov, P. V. Koroleva |
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| Rok vydání: | 2017 |
| Předmět: |
Soil line
Plane (geometry) Soil Science Spectral space Soil science 04 agricultural and veterinary sciences Vegetation Soil surface 010501 environmental sciences 01 natural sciences Normalized Difference Vegetation Index Digital soil mapping 040103 agronomy & agriculture Perpendicular 0401 agriculture forestry and fisheries Environmental science 0105 earth and related environmental sciences Earth-Surface Processes |
| Zdroj: | Eurasian Soil Science. 50:1375-1385 |
| ISSN: | 1556-195X 1064-2293 |
| DOI: | 10.1134/s1064229317100040 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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