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Annual cropland mapping using data mining and OLI Landsat-8. Repositório Alice
OLDONI, L. V.; CATTANI, C. E. V.; MERCANTE, E.; JOHANN, J. A.; ANTUNES, J. F. G.; ALMEIDA, L..
ABSTRACT: In the state of Paraná, Brazil, there are no major changes in areas cultivated with annual crops, mainly due to environmental laws that do not allow expansions to new areas. There is a great contribution of the annual crops to the domestic demand of food and economic demand in the exports. Thus, the area and distribution of annual crops are information of great importance. New methodologies, such as data mining, are being tested with the objective of analyzing and improving their potential use for classification of land use and land cover. This study used the classifiers decision tree and random forest with Normalized Difference Vegetation Index (NDVI) temporal metrics on images from Operational Land Imager (OLI)/Landsat-8. The results were...
Tipo: Artigo de periódico Palavras-chave: Árvore de decisão; Métricas temporais de NDVI; Mineração de dados; Séries temporais; Decision tree; NDVI temporal metrics; Random forest; Data mining; Normalized difference vegetation index; Time series analysis.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1114915
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Annual cropland mapping using data mining and OLI Landsat-8 AGRIAMBI
Oldoni,Lucas V.; Cattani,Carlos E. V.; Mercante,Erivelto; Johann,Jerry A.; Antunes,João F. G.; Almeida,Luiz.
ABSTRACT In the state of Paraná, Brazil, there are no major changes in areas cultivated with annual crops, mainly due to environmental laws that do not allow expansions to new areas. There is a great contribution of the annual crops to the domestic demand of food and economic demand in the exports. Thus, the area and distribution of annual crops are information of great importance. New methodologies, such as data mining, are being tested with the objective of analyzing and improving their potential use for classification of land use and land cover. This study used the classifiers decision tree and random forest with Normalized Difference Vegetation Index (NDVI) temporal metrics on images from Operational Land Imager (OLI)/Landsat-8. The results were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Decision tree; Random forest; NDVI temporal metrics.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019001200952
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Associação de SNPs com características de carcaça em uma população da raça Canchim. Repositório Alice
MOKRY, F. B.; LIMA, A. O. de; URBINATI, I.; TORRES JUNIOR, R. A. de A.; HIGA, R. H.; REGITANO, L. C. de A..
Resumo: Foram genotipados 400 animais Canchim que apresentavam fenótipos para área de olho de lombo (AOL) e espessura de gordura subcutânea (EGS). Após o controle de qualidade, foi realizado análise de associação dos SNPs com AOL e EGS por meio da metodologia de RandomForest. Os 400 indivíduos foram também reamostrados 10 vezes formando grupos de 200 indivíduos mais representativos e menos aparentados. Foi criado um grupo de SNPs contendo apenas os SNPs que foram selecionados em todas as análises, considerados os SNPs mais robustos totalizando 197 SNPs para AOL e 162 SNPs para EGS. Após o ajuste de uma regressão selecionou-se um conjunto de 20 SNPs para AOL com R2=0,59 e um conjunto de 17 SNPs para EGS com R2=0,49. Esses SNPs ainda precisam ser validados...
Tipo: Anais e Proceedings de eventos Palavras-chave: Área de olho de lombo; Bovino de corte; Espessura de gordura subcutânea; Random forest; Ribeye area; Backfat; Single nucleotide polymorphism; Beef cattle.
Ano: 2012 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/946729
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Big Earth Observation Data e aprendizado de máquina para mapeamento da agricultura sustentável no Brasil. Repositório Alice
KUCHLER, P. C.; SIMÕES, M.; BÉGUÉ, A.; FERRAZ, R. P. D.; ARVOR, D..
A implementação do iLP, ou seja, a diversificação, rotação, consorcio e/ou sucessão das atividades agrícolas e de pecuária na mesma área formando um único sistema, é considerada uma importante estratégia de intensificação agrícola sustentável para brasil, com diversos impactos positivos com destaque na conservação do solo e rentabilidade e viabilidade econômica. O acompanhamento da implantação desta iniciativa é fundamental como instrumento de gestão pública, porém ainda é um desafio. Nesta direção, este trabalho discute a aplicação dos conceitos de BIG DATA e aprendizado de máquina para o sensoriamento remoto. Como teste foi utilizado o classificador Random Forest (RF) aplicado a séries temporais MODIS para analisar a capacidade de detecção de certos...
Tipo: Parte de livro Palavras-chave: Séries temporais; Random forest; Mato Grosso; Sistemas integrados; Big Earth Observation Data; Aprendizado de máquina; Sensoriamento Remoto; Remote sensing.
Ano: 2021 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1135867
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Biometric characteristics and canopy reflectance association for early-stage sugarcane. Repositório Alice
ROCHA, M. G. da; BARROS, F. M. M. de; OLIVEIRA, S. R. de M.; AMARAL, L. R. do.
ABSTRACT: Knowing the spatial variability of sugarcane biomass in the early stages of development may help growers in their management decision-making. Proximal canopy sensing is a promising technology that can identify this variability but is limited to quantifying plant-specific parameters. In this study, we evaluated whether biometric variables integrated with canopy reflectance data can assist in the generation of models for early-stage sugarcane biomass prediction. To substantiate this assertion, four sugarcane-producing fields were measured with an active crop canopy sensor and 30 sampling plots were selected for manually quantifying chlorophyll content, plant height, stalk number and aboveground biomass. We determined that Random Forest and Multiple...
Tipo: Artigo de periódico Palavras-chave: Floresta aleatória; Índice de vegetação; Mineração de dados; Precision farming; Random forest; Vegetation indices; Data mining; Canopy sensor; Biomassa; Cana de Açúcar; Agricultura de Precisão; Biomass; Sugarcane; Precision agriculture; Vegetation index.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1110823
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Biometric characteristics and canopy reflectance association for early-stage sugarcane biomass prediction Scientia Agricola
Rocha,Murillo Grespan da; Barros,Flávio Margarito Martins de; Oliveira,Stanley Robson de Medeiros; Amaral,Lucas Rios do.
ABSTRACT: Knowing the spatial variability of sugarcane biomass in the early stages of development may help growers in their management decision-making. Proximal canopy sensing is a promising technology that can identify this variability but is limited to quantifying plant-specific parameters. In this study, we evaluated whether biometric variables integrated with canopy reflectance data can assist in the generation of models for early-stage sugarcane biomass prediction. To substantiate this assertion, four sugarcane-producing fields were measured with an active crop canopy sensor and 30 sampling plots were selected for manually quantifying chlorophyll content, plant height, stalk number and aboveground biomass. We determined that Random Forest and Multiple...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Random forest; Canopy sensor; Vegetation indices; Precision farming; Data mining.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162019001400274
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Can we generate robust species distribution models at the scale of the Southern Ocean? ArchiMer
Fabri-ruiz, Salomé; Danis, Bruno; David, Bruno; Saucède, Thomas.
Aim Species distribution modelling (SDM) represents a valuable alternative to predict species distribution over vast and remote areas of the ocean. We tested whether reliable SDMs can be generated for benthic marine organisms at the scale of the Southern Ocean. We aimed at identifying the main large‐scale factors that determine the distribution of the selected species. The robustness of SDMs was tested with regards to sampling effort, species niche width and biogeography. Location Southern Ocean. Methods The impact of sampling effort was tested using two sets of data: one set with all presence‐only data available until 2005, and a second set using all data available until 2015 including recent records from campaigns carried out during the Census of...
Tipo: Text Palavras-chave: Antarctic; Biogeography; Conservation; Echinoidea; Ecological niche; Random forest; Sampling effort; Sub-Antarctic.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00458/56990/58881.pdf
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Estimating double cropping plantations in the Brazilian Cerrado through PlanetScope monthly mosaics. Repositório Alice
SANO, E. E.; BOLFE, E. L.; PARREIRAS, T. C.; BETTIOL, G. M.; VICENTE, L. E.; DEL'ARCO SANCHES, I.; VICTORIA, D. de C..
Abstract: Farmers in the Brazilian Cerrado are increasing grain production by cultivating second crops during the same crop growing season. The release of PlanetScope (PS) satellite images represents an innovative opportunity to monitor double cropping production. In this study, we analyzed the potential of six PS monthly mosaics from the 2021/2022 crop growing season to discriminate double cropping areas in the municipality of Goiatuba, Goiás State, Brazil. The four multispectral bands of the PS images were converted into normalized difference vegetation index (NDVI), enhanced vegetation index (EVI), green-red normalized difference index (GRNDI), and textural features derived from the gray-level co-occurrence matrix (GLCM). The ten most important...
Tipo: Artigo de periódico Palavras-chave: Floresta aleatória; Mapeamento do uso da terra; Mapeamento de cobertura da terra; Cobertura da terra; Constelação de satélites; Matriz de coocorrência em nível de cinza; Savana tropical; Random forest; Gray-level co-occurrence matrix; GRNDI; Land use and land cover mapping; Satellite constellation; Tropical savanna; Uso da Terra; Land use; Land cover.
Ano: 2023 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1152103
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Estimation of elemental composition of agricultural soils from West Azerbaijan, Iran, using mid-infrared spectral models AGRIAMBI
Goydaragh,Maryam Ghebleh; Jafarzadeh,Ali Asghar; Shahbazi,Farzin; Oustan,Shahin; Taghizadeh-Mehrjardi,Ruhollah; Lado,Marcos.
ABSTRACT Characterizing the elemental composition provides useful information about the weathering degree of soils. In Miandoab County, Northern Iran, this characterization was missing, and thus the objectives of this work were to evaluate the weathering degrees for the most typical soils in the area from their elemental compositions, and to estimate this elemental composition using Fourier transform infrared spectroscopy and Random Forest models. Five soil profiles, including Aridisols and Inceptisols, were selected as the most representative of the area. Major elemental oxides were determined in each genetic horizon by X-ray fluorescence, showing that these soils were at early developmental stages. Only Al2O3 and CaO were accurately estimated, with R2...
Tipo: Info:eu-repo/semantics/article Palavras-chave: FTIR spectra; Random forest; Weathering.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000600460
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Estudo de associação genômica empla utilizando Random Forest: estudo de caso em bovinos de corte. Repositório Alice
HIGA, R. H.; MOKRY, F. B.; MUDADU, M. de A.; LOBO, F. P.; REGITANO, L. C. de A..
A aplicação de técnicas de aprendizado de máquina, que consideram o efeito de múltiplos SNPs a problemas de estudos de associação em genônica ampla (GWAS) é de grande interesse, pois essas técnicas são potencialmente capazes de identificar variantes onde o modelo causal é desconhecido e de lidar com o problema de alta dimensionalidade dos dados.
Tipo: Parte de livro Palavras-chave: Associação genômica; Random forest; Estudo; Gado de Corte.
Ano: 2014 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1014991
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Evaluation of early season mapping of integrated crop livestock systems using Sentinel-2 data. Repositório Alice
TORO, A. P. S. G. D.; WERNER, J. P. S.; REIS, A. A. dos; ESQUERDO, J. C. D. M.; ANTUNES, J. F. G.; COUTINHO, A. C.; LAMPARELLI, R. A. C.; MAGALHÃES, P. S. G.; FIGUEIREDO, G. K. D. A..
ABSTRACT. Various approaches were developed considering the need to increase agricultural productivity in cultivated areas without more deforestation, such as the Integrated Crop livestock systems (ICLS). The ICLS could be composed of annual crops followed by pastureland with the presence of cattle. Due to the high temporal dynamic of rotation between crops over the season, monitoring these areas is a big challenge. Also, agricultural organizations worldwide highlight the need for early-season maps for this kind of work. In this context, this study evaluated the potential of open data (Sentinel-2) data to map ICLS areas. The performance of two classifiers was evaluated: one of Machine Learning (random forest) and the other of Deep Learning (LSTM). Three...
Tipo: Artigo de periódico Palavras-chave: Agricultura regenerativa; Identificação de culturas; Floresta aleatória; Aprendizado profundo; LSTM; Regenerative agriculture; Crop identification; Random forest; Sensoriamento Remoto; Remote sensing.
Ano: 2022 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1145714
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Exploring Machine Learning to Correct Satellite-Derived Sea Surface Temperatures ArchiMer
Picart, Stephane Saux; Tandeo, Pierre; Autret, Emmanuelle; Gausset, Blandine.
Machine learning techniques are attractive tools to establish statistical models with a high degree of non linearity. They require a large amount of data to be trained and are therefore particularly suited to analysing remote sensing data. This work is an attempt at using advanced statistical methods of machine learning to predict the bias between Sea Surface Temperature (SST) derived from infrared remote sensing and ground “truth” from drifting buoy measurements. A large dataset of collocation between satellite SST and in situ SST is explored. Four regression models are used: Simple multi-linear regression, Least Square Shrinkage and Selection Operator (LASSO), Generalised Additive Model (GAM) and random forest. In the case of geostationary satellites for...
Tipo: Text Palavras-chave: Machine learning; Systematic error; Sea surface temperature; Random forest.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00426/53797/54721.pdf
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Global patterns and predictors of trophic position, body size and jaw size in fishes ArchiMer
Kopf, R. Keller; Yen, Jian D. L.; Nimmo, Dale G.; Brosse, Sébastien; Villeger, Sébastien; Tittensor, Derek.
Aim The aim of this study was test whether maximum body mass and jaw length are reliable predictors of trophic position (TP) in fishes, and to compare linear and nonlinear machine‐learning (ML) models incorporating biogeography, habitat and other morphological traits. Location Global. Time period Modern. Major taxa studied Fishes. Methods We compiled a global database of TP (2.0–4.5), maximum body mass, jaw length, order, ecoregion, habitat and other morphological traits of freshwater, estuarine and diadromous fishes (n = 1,991). We used Bayesian linear mixed effects and ML, with r2 analogues and 10‐fold cross‐validation, to explain and predict TP. Results Random forest models outperformed Bayesian models in all comparisons. Jaw length was the most...
Tipo: Text Palavras-chave: Allometric trophic network models; Allometry; Body mass; Gape limitation; Machine learning; Predator– Prey; Random forest; Trophic network theory.
Ano: 2021 URL: https://archimer.ifremer.fr/doc/00661/77349/78823.pdf
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Land use and land cover classification in the northern region of Mozambique based on Landsat time series and machine learning. Repositório Alice
MACARRINGUE, L. S.; BOLFE, E. L.; DUVERGER, S. G.; SANO, E. E.; CALDAS, M. M.; FERREIRA, M. C.; ZULLO JUNIOR, J.; MATIAS, L. F..
Accurate land use and land cover (LULC) mapping is essential for scientific and decision-making purposes. The objective of this paper was to map LULC classes in the northern region of Mozambique between 2011 and 2020 based on Landsat time series processed by the Random Forest classifier in the Google Earth Engine platform. The feature selection method was used to reduce redundant data. The final maps comprised five LULC classes (non-vegetated areas, built-up areas, croplands, open evergreen and deciduous forests, and dense vegetation) with an overall accuracy ranging from 80.5% to 88.7%. LULC change detection between 2011 and 2020 revealed that non-vegetated areas had increased by 0.7%, built-up by 2.0%, and dense vegetation by 1.3%. On the other hand,...
Tipo: Artigo de periódico Palavras-chave: Cobertura da terra; Floresta aleatória; Séries temporais; Aprendizado de máquina; Google Earth Engine; Feature selection; Miombo; Random forest; Machine learning; Desmatamento; Uso da Terra; Deforestation; Land use; Land cover.
Ano: 2023 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1155979
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Mapeamento digital da CTC em solos do semiárido brasileiro. Repositório Alice
CHAGAS, C. da S.; CARVALHO JUNIOR, W. de; BHERING, S. B.; PEREIRA, N. R..
O planejamento de uso e o manejo sustentável da terra requerem informações confiáveis sobre a distribuição espacial de propriedades físicas e químicas do solo que afetam os processos e serviços na paisagem. Neste sentido, a capacidade de troca catiônica (CTC) é uma das propriedades do solo mais importantes, sendo considerada como um indicador vital da qualidade do solo, porém, sua obtenção é cara e demorada. Embora muitos estudos tenham sido conduzidos para identificar o padrão espacial da distribuição de propriedades do solo em várias escalas e várias paisagens, pouco se conhece sobre as relações existentes entre estas propriedades e diferentes covariáveis ambientais no semiárido brasileiro. Sendo assim, o objetivo desse estudo foi avaliar a eficiência...
Tipo: Separatas Palavras-chave: Mapeamento digital de solos; Random forest; Cokrigagem.
Ano: 2015 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1031631
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Mapeamento digital de atributos físicos e físico-hídricos do solo por técnicas de mineração de dados. Repositório Alice
CHAGAS, C. da S.; BHERING, S. B.; CARVALHO JUNIOR, W. de; PEREIRA, N. R..
O presente estudo tem por objetivo comparar a eficiência dos modelos AR, RF e RNA na predição de atributos físicos e físico-hídricos do solo utilizando dados do sensor TM do Landsat 5 como covariáveis ambientais em uma área do semiárido brasileiro.
Tipo: Separatas Palavras-chave: Árvores de regressão; Random forest; Redes neurais artificiais.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1059787
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Microbiological Indicators of Soil Quality Under Native Forests are Influenced by Topographic Factors Anais da ABC (AABC)
TEIXEIRA,ANITA F.S.; SILVA,JACQUELINE S.; VILELA,LAÍZE A.F.; COSTA,PATRÍCIA F.; COSTA,ELAINE M. DA; GUIMARÃES,AMANDA A.; SANTOS,JESSÉ V. DOS; SILVA,SÉRGIO H.G.; CARNEIRO,MARCO AURÉLIO C.; MOREIRA,FATIMA M.S..
Abstract: Several microbiological indicators of soil quality present high sensitivity, but little is known about the influence of topographic factors on them. This work aimed to evaluate variability of biological indicators of soil quality across a hillslope under native forest and the influence of topographic factors on them. Four positions on a hillslope were evaluated. Activity of the enzymes β-glucosidase, acid phosphatase, urease and fluorescein diacetate (FDA) hydrolysis were determined, as well as basal and substrate-induced respiration, and density of microorganisms: total bacteria, total fungi, actinobacteria, phosphate solubilizers, ammonifiers, native rhizobia, free-living N2-fixing bacteria, spores of arbuscular mycorrhizal fungi and percentage...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biological indicators; Digital elevation model; Enzymes; Microbial activity; Random forest.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000700866
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Modeling and prediction of sulfuric acid digestion analyses data from PXRF spectrometry in tropical soils Scientia Agricola
Silva,Sérgio Henrique Godinho; Silva,Elen Alvarenga; Poggere,Giovana Clarice; Pádua Junior,Alceu Linares; Gonçalves,Mariana Gabriele Marcolino; Guilherme,Luiz Roberto Guimarães; Curi,Nilton.
ABSTRACT Sulfuric acid digestion analyses (SAD) provide useful information to environmental studies, in terms of the geochemical balance of nutrients, parent material uniformity, nutrient reserves for perennial crops, and mineralogical composition of the soil clay fraction. Yet, these analyses are costly, time consuming, and generate chemical waste. This work aimed at predicting SAD results from portable X-ray fluorescence (pXRF) spectrometry, which is proposed as a “green chemistry” alternative to the current SAD method. Soil samples developed from different parent materials were analyzed for soil texture and SAD, and scanned with pXRF. The SAD results were predicted from pXRF elemental analyses through simple linear regressions, stepwise multiple linear...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil clay fraction; Weathering indices; Random forest; Proximal sensors; Green chemistry.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162020000401402
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Modeling forest aboveground carbon density in the Brazilian Amazon with integration of MODIS and Airborne LiDAR data. Repositório Alice
JIANG, X.; LI, G.; LU, D.; MORAN, E.; BATISTELLA, M..
Abstract: Timely updates of carbon stock distribution are needed to better understand the impacts of deforestation and degradation on forest carbon stock dynamics. This research aimed to explore an approach for estimating aboveground carbon density (ACD) in the Brazilian Amazon through integration of MODIS (moderate resolution imaging spectroradiometer) and a limited number of light detection and ranging (Lidar) data samples using linear regression (LR) and random forest (RF) algorithms, respectively. Airborne LiDAR data at 23 sites across the Brazilian Amazon were collected and used to calculate ACD. The ACD estimation model, which was developed by Longo et al. in the same study area, was used to map ACD distribution in the 23 sites. The LR and RF methods...
Tipo: Artigo de periódico Palavras-chave: Densidade de carbono acima do solo; Floresta aleatória; Amazônia brasileira; Random forest; MODIS; Brazilian Amazon; Linear regression; Aboveground carbon density; Regressão Linear; Biomassa; Aboveground biomass; Carbon; Lidar.
Ano: 2020 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1126323
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Modeling of stem form and volume through machine learning Anais da ABC (AABC)
SCHIKOWSKI,ANA B.; CORTE,ANA P.D.; RUZA,MARIELI S.; SANQUETTA,CARLOS R.; MONTAÑO,RAZER A.N.R..
Abstract Taper functions and volume equations are essential for estimation of the individual volume, which have consolidated theory. On the other hand, mathematical innovation is dynamic, and may improve the forestry modeling. The objective was analyzing the accuracy of machine learning (ML) techniques in relation to a volumetric model and a taper function for acácia negra. We used cubing data, and fit equations with Schumacher and Hall volumetric model and with Hradetzky taper function, compared to the algorithms: k nearest neighbor (k-NN), Random Forest (RF) and Artificial Neural Networks (ANN) for estimation of total volume and diameter to the relative height. Models were ranked according to error statistics, as well as their dispersion was verified....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Artificial intelligence; Data mining; Random forest; ANN.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000703389
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