干旱区生态环境知识资源中心

This paper treats an application concerning the use of spatial high resolution imagery ( SPOT XS data) for mapping salt-affected soils in arid zones. The methodology adapted is based on the confrontation of data collected in the field and the classification of the spectral data. It is also based on the calculation and the use of soil and vegetation indices ( brightness index (IB), colour index (IC)) as well as the spectral behaviour analysis of reference plots. These plots are used to perform a supervised classification of the colour composite of the mentioned indices. An error matrix is calculated for assessing the accuracy of results. According to this study, band combinations using XS3, brightness index, and colour index appear to be the most useful.