The objective of this research was to quantify deforestation, considering the spatial and temporal changes of forest loss for the period from 1985 to 2018. We used Landsat sensor images for the same period, according to orbits/points 223/62 and 223/61. Color compositions, linear contrast enhancement and segmentation were performed. The interpretation and the classification of the images were performed through ...
This study aimed to analyze the changes in use and vegetation cover in the municipality of Vigia and to evaluate the Normalized Difference Vegetation Index-NDVI in a transition area of cerrado and secondary vegetation in the same municipality. Presenting two different scales, one at the municipal level and the other analysis was at the local level. The Grassland class showed an increase, from 107 km² in 1985 ...
Universidade do Estado do Par?. Bel?m, PA, Brasil.; Universidade Federal do Par?. Bel?m, PA, Brasil.; Universidade Federal do Par?. Bel?m, PA, Brasil.; Centro Universit?rio do Estado do Par?. Bel?m, PA, Brasil.; Minist?rio da Sa?de. Secretaria de Vigil?ncia em Sa?de. Instituto Evandro Chagas. Ananindeua, PA, Brasil.; Universidade do Estado do Par?. Bel?m, PA, Brasil / Minist?rio da Sa?de. Secretaria de Vigil?nc...
The Ecuadorian Amazon is considered a biodiverse region, and at the same time contains the largest number of oil blocks and oilfields in the country. Oil exploitation requires the implementation of oil facilities and related infrastructure, such as roads, water, and energy supply, for operation. These large engineering works can alter the dynamics of the Amazonian natural ecosystems. This paper analyzes the lan...
A Faixa de Fronteira da Amazônia Legal é uma região complexa e com grande contraste social, ambiental e econômico. Cáceres (MT) e Oriximiná (PA) ilustram essa realidade: tem origens similares, ligadas à dinâmica dos rios, mas percorreram trajetórias inteiramente diferentes após a intervenção do governo federal na Amazônia, a partir de 1960. Atualmente, Cáceres possui economia com base no comércio, serviços, tur...
Universidade Federal do Par?. Bel?m, PA, Brasil / Universidade do Estado do Par?. Bel?m, PA, Brasil.; Universidade Federal do Par?. Bel?m, PA, Brasil / Universidade do Estado do Par?. Bel?m, PA, Brasil.; Instituto Nacional de Pesquisas Espaciais. Bel?m, PA, Brasil.; Instituto Nacional de Pesquisas Espaciais. Bel?m, PA, Brasil.; Instituto Nacional de Pesquisas Espaciais. Bel?m, PA, Brasil.; Universidade do Estad...
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The State of Minas Gerais is the major coffee producer in Brazil. The crop is spread over different environments as wellas different management systems. Knowledge about environmental variables helps to establish and define appropriate managementpractices for the coffee crop. The objective of this study was to access spatially and quantitatively the occupation of coffee crop in MinasGerais and to elaborate a lan...
Leaf area (LA) is an indicative of crop yield and is required in most agronomic and physiological studies. In this work, two methods to measure coffee leaf area, one based on leaf dimensions and the other on digital imaging, were compared to the standard LI-COR method, using whole and damaged leaves. The digital image measurements, taken in the lab (destructive sample) and in the field (non-destructive sample),...