Satellite images on the discrimination of soils developed from basalt and sandstone of Paraguaçu Paulista region

Abstract

The objective of this work was to evaluate soil characterization and discrimination by spectral information obtained from satellite sensor. Soils presented variation on the spectral signature, and on their spectral intensity. Typic Argiudoll (Alfisols) presented low spectral intensity, and Typic Quartzpisament presented a high spectral intensity. Typic Haplorthox (Oxisols) presented increments in its reflectance according to the texture. Eutrophic soils presented greater reflectance intensities than Alic soils. The discriminate analyses indicate a 0.028% error. Mistake samples occurred due to similar characteristics of soils. The methodology used to collect spectral data from satellite sensor showed to be efficient, and made possible soil discrimination, as well as faster soil survey of the presented region.