Comparação Entre Diferentes Algoritmos De Classificação Supervisionada No Mapeamento Temático De Uma Bacia Hidrográfica

Santos, Leovigildo Aparecido Costa; Lima, Paulo

doi:10.18677/treedimensional2018a3

Cited by 3 publications

(2 citation statements)

References 3 publications

(4 reference statements)

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“…Highlights and contrast were used to facilitate the interpretation of the targets and terrestrial features in the image. For the land-use and ground-cover survey, the supervised maximum likelihood classification method was used-MAXVER (Santos and Lima, 2018). Land use, including that of natural and anthropic areas, was classified into seven types: a) Agriculture, which includes areas occupied by annual and perennial crops; b) Water, which includes lakes, rivers, and streams; c) Urban area, which encompasses roads, residences, and industries; d) Pasture, which comprises pasture areas intended for cattle raising; e) Woodland, which consists of forests with vegetation areas from native Cerrado; f) Burn scar, which includes regions where burnings or forest fires have occurred; and g) Exposed soil, which includes areas without vegetation cover.…”

Section: Spatial Analysis Of Use and Land Covermentioning

confidence: 99%

Effect of land-use pattern on the physicochemical and genotoxic properties of water in a low-order stream in Central Brazil

Bailão¹,

Santos²,

Almeida³

et al. 2020

Rev. ambiente água

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Low-order streams located near urban areas usually receive domestic, industrial, and agricultural wastewaters that negatively affect river water quality. Additionally, water pollution is associated with land-use variations around the river, which is characterized by unplanned urbanization, intense agricultural activities, and deforestation. This work correlated land-use patterns with physicochemical quality and genotoxic potential of water at four points (P1 to P4) along the Extrema River, located in an industrial and agricultural area of Central Brazil. Physicochemical analyses indicated that the water collected from the Extrema River is inappropriate for human consumption. Using the Allium cepa model, no evidence of cytotoxicity was observed at any point; in contrast, the genotoxic potential of these water samples was observed. The correlation of these results with land use showed that the water collected at P3 was the most contaminated; this is probably due to the inflow of wastewater from municipal, industrial, and agriculture activities. Different results were observed for P2 and P4, where land-use analysis attributed the water quality to forest burns. We concluded that differential use of the land changed the characteristics of the associated river water, and A. cepa parameters were more related to land-use characteristics than to physicochemical parameters. This study highlighted the importance of associating land use with the cyto genotoxic potential of water.

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Section: Spatial Analysis Of Use and Land Covermentioning

confidence: 99%

Effect of land-use pattern on the physicochemical and genotoxic properties of water in a low-order stream in Central Brazil

Bailão¹,

Santos²,

Almeida³

et al. 2020

Rev. ambiente água

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“…Moreover, were identified research whose objective is the comparison of the effectiveness of classifying algorithms (Amaral et al 2009;Mello et al 2012;Santos & Lima 2018). Duhl, Guenther & Helmig (2012) obtained satisfactory results in their studies using images from Google Earth®, for the mapping of urban vegetation cover.…”

Section: Introductionmentioning

confidence: 99%

Digital Image Classification: a Comparison of Classic Methods for Land Cover and Land Use Mapping

Santos

Carmo

Nunes

et al. 2022

Anu. Inst. Geociênc.

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In the classification of images for land cover and land use mapping, several methods can be applied, however, they can present different results in relation to field truth. Therefore, the objective of this work was to test techniques for classifying high spatial digital images obtained from the Google Earth Pro® platform. The images refer to a section of the Federal University of Goias, campus Samambaia Goiania - GO, Brazil. Classification tests were performed on the images obtained, using two classifiers per region and two classifiers per pixel, both available free of charge, in the Spring software of the National Institute for Space Research (INPE / Brazil). For the analysis of the quality of the classifications, the results were compared to a survey by direct method, in this case the topographic one, seeking to identify which classifier came closest to the field truth. The classification that presented the best performance and class separability was the Bhattacharya, with Global Accuracy of 0.85. Bhattacharya was also the classifier that came closest in terms of measured areas, by the topographic survey, with the areas of the “zinc roofing” use class, analyzed and calculated.

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Dinâmica de ocupação e passivos ambientais nos assentamentos rurais do município de Goiás-GO

Santos

Pina

Brito

et al. 2021

Rev. Bras. Geog. Fis.

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Estudos sobre a influência de assentamentos rurais no processo de desmatamento são normalmente controversos. Alguns apontam uma aceleração desse processo, enquanto outros demonstram que nesses locais a dinâmica de uso do solo segue uma tendência regional. No Cerrado (a savana brasileira) esse é um fenômeno ainda pouco conhecido. Nosso objetivo foi analisar o uso e a cobertura do solo em assentamentos rurais do município de Goiás – região com grande destaque nacional –, com foco nas áreas de preservação permanente (APPs) de cursos d’água. Foram empregadas técnicas de geoprocessamento e classificação de imagens de satélites para quatro anos (1985, 1991, 1995 e 2018), com abrangência temporal de 33 anos. Para verificar o padrão do uso do solo em áreas dentro e fora de APPs, nos assentamentos rurais e no restante do município, foram empregadas análises de componentes principais. Os resultados indicam que as áreas com vegetação nativa reduziram em 33% e 34%, para os assentamentos e o restante do município, respectivamente. As classes ligadas às atividades agropecuárias tiveram aumento entre o ano inicial e final do estudo. A ocupação do solo por atividades agropecuárias, dentro das áreas de preservação permanente, teve uma maior redução nos assentamentos. Concluímos que as dinâmicas do uso e ocupação do solo nos assentamentos e no restante do município seguem uma tendência parecida, porém com um atendimento ao código florestal ligeiramente maior nos assentamentos, representando uma maior conservação relativa de áreas nativas do Cerrado. Dynamics of occupation and environmental liabilities in rural settlements in the municipality of Goiás, Goiás A B S T R A C TStudies are controversial about the influence of the implantation of rural settlements in the deforestation process, some point that there is an acceleration of this process, others already show that in these places the dynamics of land use follows a regional trend. In the Cerrado (the Brazilian savannah) this is still a little-known phenomenon. Our objective was to analyze land use and cover in rural settlements and for the municipality of Goiás, where they are located, with a focus on permanent preservation areas (APPs) of water courses. Geoprocessing and satellite image classification techniques were used for four years (1985, 1991, 1995 and 2018), with a time span of 33 years. To check the pattern of land use in areas inside and outside APPs, in rural settlements and in the rest of the municipality, principal component analyzes were used. The results show that the areas with native vegetation reduced by 33% and 34%, for the settlements and the rest of the municipality, respectively. The classes linked to agricultural activities had an increase between the initial and final year of the study. The occupation of the land by agricultural activities, within the areas of permanent preservation, had a greater reduction in the settlements. We conclude that the dynamics of land use and occupation in the settlements and in the rest of the municipality follow a similar trend, it cannot be said that the settlements are responsible for a greater deforestation of native areas of the Cerrado.Keywords: deforestation, Cerrado, geoprocessing, land use.

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Comparação Entre Diferentes Algoritmos De Classificação Supervisionada No Mapeamento Temático De Uma Bacia Hidrográfica

Cited by 3 publications

References 3 publications

Effect of land-use pattern on the physicochemical and genotoxic properties of water in a low-order stream in Central Brazil

Effect of land-use pattern on the physicochemical and genotoxic properties of water in a low-order stream in Central Brazil

Digital Image Classification: a Comparison of Classic Methods for Land Cover and Land Use Mapping

Dinâmica de ocupação e passivos ambientais nos assentamentos rurais do município de Goiás-GO

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