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COMPARATIVE ANALYSIS OF TM/LANDSAT AND SAR/ERS-1 MULTITEMPORAL 
SCENES OF GUAIRA REGION SAO PAULO STATE, BRAZIL 
Darcton Policarpo Damiäo 
H.J.H.Kux 
Centro Técnico Aeroespacial - CTA 
Instituto de Aeronáutica e Espaqo - IAE 
Pca. Mal. Eduardo Gomes, 50 - Vila das Acácias 
12228-904 Sao José dos Campos, SP, Brazil 
ISPRS Commission VII / Working Group 2 
ABSTRACT 
The objective of this study is to analyse and compare two data sets of both TM/Landsat and SAR/ERS-1, 
during two seasons (dry and wet), of an important region with irrigated agriculture. 
In order to perform this comparison, two approaches were used: a qualitative and a quantitative one. After 
visual image interpretation supported by field work and auxiliary data, the Kappa coefficient was applied and 
tested. The results indicate that merging of these data sets strongly improves the quality of interpretation, 
specially when principal component and intensity, hue and saturation (IHS) transforms are used. 
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