SPECTRAL SEPARABILITY BETWEEN EUCALYPTUS AND NATURAL STANDS 
Ricardo Seixas Brites 
Celestino Aspiazü 
Carlos A. Alvares Ribeiro 
José Carlos Ribeiro 
Universidade Federal de Viçosa 
Departamento de Engenharia Florestal 
CEP 36570 - Vicosa, MG, Brasil 
ISPRS Commission VII / Working Group 1 
ABSTRACT 
For this study, the seven Landsat-5 spectral bands in digital format and also a color composite of bands 3, 4 
and 5 were utilized to determine the best individual bands to allow the spectral discrimination between 
Eucalyptus and native stands. Using a software for image processing called GAVIAO, developed at UFV, the 
available data were analysed. Samples from exactly the same areas were taken from each age of Eucalyptus 
(varying from 1 to 7 years old) as well as from native stands in each spectral band. The color composite 
image was used in order to get the geographical position of the sampling areas. After the statistical analyses 
comparing each sample of Eucalyptus with each sample extracted from the native stands in each spectral band 
was concluded that the bands 3, 4 and 7 could be used to accomplish the task of establishing the separation 
between the two types of vegetation. 
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