@Article{Paradella:1986:SiLiIn,
               author = "Paradella, Waldir Renato",
                title = "O significado litologico da informacao espectral e temporal 
                         (sazonal)de dados digitais MSS do satelite Landsat-3 para baixo do 
                         vale do Rio Curaca, Bahia",
              journal = "Geoci{\^e}ncias",
                 year = "1986",
               volume = "16",
               number = "2",
                pages = "135--148",
                month = "jun.",
             keywords = "GEOLOGIA, RIO CURACA (BA), MSS LANDSAT, LANDSAT-3, LITOLOGIA, 
                         LITHOLOGY.",
             abstract = "Spectral and seasonal information from computer enhanced MSS 
                         Landsat 3 data were evaluation within the context of lithological 
                         discrimination in the lower valley of Curaca River, State of 
                         Bahia, Northeast of Brazil. The chosen area im made up of low to 
                         high Archean-Proterozoic metamporphic rockes and constitutes part 
                         of the important copper province of the Curaca Valley, 100 km 
                         north of the Caraiba Copper Mune. The vegetation is represented by 
                         the caatinga, typicalof the Brazilian semi-arid environment with 
                         variable cover density and marked seasonality. The occurrence of 
                         rock outcrops is not high. Several digital enhacement techniques 
                         were applied including: 1)Linear Contrast Stretch: 2)Stretched 
                         Band Ratio and 3)Principal Component Transformation. These 
                         techniques allowed to emphasize subtle difference in the spectral 
                         reflectance of the surface which were good indicatos of the 
                         changes in the residual soil composition and geobotanical controls 
                         given by variations in the vegetation cover well-correlated with 
                         the lithological variations of the lithological units mapped by 
                         conventional methods in the 1:50,000 scale and provided 
                         additionally new contributions to the geological knowledge of the 
                         area. The spectral measurements collected in situ for with the 
                         data registered ny the Landsat MSS CCT's and provided additional 
                         information to the understanding of the causes of the variations 
                         in the registered spectral data. The analysis of the orbital data 
                         from the dry season was not sufficient to express the lithological 
                         differences, but the multiseasonal approach was of great value.",
                 issn = "0101-9082",
                label = "834",
           targetfile = "paradella_significado.pdf",
        urlaccessdate = "2024, May 01"
}