59697

Evolução da área de pastagem cultivada na microrregião de Itaberaba - BA

Favoritar este trabalho

Several methodologies were propose and applied to mapping of different land coverage and uses. Difficulties and limitations, such as cloud cover, spectral confusions and scales to be adopted are often found in different activities and studies. Thus, the identification of pastures is a work that must be carefully planned and executed. Pastures occurrence in different landscape conditions, such as soils, climates and reliefs, and in association with different systems of management and grazing, it was provide different spectral responses. Such responses are expressed in images in the form of patterns, characterized by different colors and textures. This paper aims to analyze and apply a methodology to mapping pastures, in regional scale, based on reflectance parameters and spectral indices, derivative from Landsat 8 satellite OLI sensor. We seek by segmentation and subsequent identification of different pastures patterns, an analysis of which bands and indexes would be better suited for the classification of pasture polygons, using mostly band 6 of the Landsat 8. The study area was the Itaberaba microregion, located in the Caatinga biome, which has the most territory covered by pastures. The result obtained by this mapping was compared and analyzed with official data from the Ministry of the Environment, and the Agricultural Census and the Municipalities Livestock Research.