ABSTRACT
The Soil Line (SL) is obtained by approximating the RED-NIR values of the Bare Soil Surface (BSS). A classical SL is constructed for each Remote Sensing Data (RSD) frame and has no information on the type of soil. In the presence of many RSD for the same territory obtained at different times, it is possible to obtain a sufficient number of pairs of RED-NIR values for the BSS for each pixel in order to approximate the SL based on the multi-temporal data. Thus, each element of the resolution of the RSD receives characteristics in the form of coefficients of Multi-temporal Soil Line (MSL). MSL coefficients are calculated for an ellipse describing the multi-temporal distribution of RED-NIR values. Coefficients of TSL in three-dimensional space form an elongated cloud of values, which can be linearized by elastic approximation. Coefficients are characteristics of soils, which makes it possible to construct a soil map.
