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Registro Completo |
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Biblioteca(s): |
Embrapa Agricultura Digital; Embrapa Territorial. |
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Data corrente: |
15/02/2013 |
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Data da última atualização: |
23/02/2015 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
BROWN, J. C.; KASTENS, J. H.; COUTINHO, A. C.; VICTORIA, D. de C.; BISHOP, C. R. |
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Afiliação: |
J. CHRISTOPHER BROWN, UNIVERSITY OF KANSAS; JUDE H. KASTENS, UNIVERSITY OF KANSAS; ALEXANDRE CAMARGO COUTINHO, CNPTIA; DANIEL DE CASTRO VICTORIA, CNPM; CHRISTOPHER R. BISHOP, UNIVERSITY OF KANSAS. |
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Título: |
Classifying multiyear agricultural land use data from Mato Grosso using time-series MODIS vegetation index data. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
Remote Sensing of Environment, v. 130, p. 39-50, 2013. |
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ISBN: |
0034-4257 |
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DOI: |
http://dx.doi.org/10.1016/j.rse.2012.11.009 |
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Idioma: |
Inglês |
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Conteúdo: |
MODIS 250-m NDVI and EVI datasets are now regularly used to classify regional-scale agricultural land-use practices in many different regions of the globe, especially in the state of Mato Grosso, Brazil, where rapid land-use change due to agricultural development has attracted considerable interest from researchers and policy makers. Variation exists in which MODIS datasets are used, how they are processed for analysis, and what ground reference data are used. Moreover, various land-use/land-cover classes are ultimately resolved, and as yet, crop-specific classifications (e.g. soy-corn vs. soy-cotton double crop) have not been reported in the literature, favoring instead generalized classes such as single vs. double crop. The objective of this study is to present a rigorous multiyear evaluation of the applicability of time-series MODIS 250-m VI data for crop classification in Mato Grosso, Brazil. This study shows progress toward more refined crop-specific classification, but some grouping of crop classes remains necessary. It employs a farm field polygon-based ground reference dataset that is unprecedented in spatial and temporal coverage for the state, consisting of 2003 annual field site samples representing 415 unique field sites and five crop years (2005-2009). This allows for creation of a dataset containing "best-case" or "pure" pixels, which we used to test class separability in a multiyear cross validation framework applied to boosted decision tree classifiers trained on MODIS data subjected to different pre-processing treatments. Reflecting the agricultural landscape of Mato Grosso as a whole, cropping practices represented in the ground reference dataset largely involved soybeans, and soy-based classes (primarily double crop 'soy-commercial' and single crop 'soy-cover') dominated the analysis along with cotton and pasture. With respect to the MODIS data treatments, the best results were obtained using date-of-acquisition interpolation of the 16-day composite VI time series and outlier point screening, for which five-year out-of-sample accuracies were consistently near or above 80% and Kappa values were above 0.60. It is evident that while much additional research is required to fully and reliably differentiate more specific crop classes, particular groupings of cropping strategies are separable and useful for a number of applications, including studies of agricultural intensification and extensification in this region of the world. MenosMODIS 250-m NDVI and EVI datasets are now regularly used to classify regional-scale agricultural land-use practices in many different regions of the globe, especially in the state of Mato Grosso, Brazil, where rapid land-use change due to agricultural development has attracted considerable interest from researchers and policy makers. Variation exists in which MODIS datasets are used, how they are processed for analysis, and what ground reference data are used. Moreover, various land-use/land-cover classes are ultimately resolved, and as yet, crop-specific classifications (e.g. soy-corn vs. soy-cotton double crop) have not been reported in the literature, favoring instead generalized classes such as single vs. double crop. The objective of this study is to present a rigorous multiyear evaluation of the applicability of time-series MODIS 250-m VI data for crop classification in Mato Grosso, Brazil. This study shows progress toward more refined crop-specific classification, but some grouping of crop classes remains necessary. It employs a farm field polygon-based ground reference dataset that is unprecedented in spatial and temporal coverage for the state, consisting of 2003 annual field site samples representing 415 unique field sites and five crop years (2005-2009). This allows for creation of a dataset containing "best-case" or "pure" pixels, which we used to test class separability in a multiyear cross validation framework applied to boosted decision tree classifiers traine... Mostrar Tudo |
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Palavras-Chave: |
Árvore de decisão; Cobetura vegetal; Cross Validation; Decision tree; Sementes de soja; Soybean. |
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Thesagro: |
Algodão. |
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Thesaurus Nal: |
Cotton; Land cover; Soybeans. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/88219/1/1-s2.0-S0034425712004336-main.pdf
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Marc: |
LEADER 03405naa a2200313 a 4500
001 1964430
005 2015-02-23
008 2013 bl uuuu u00u1 u #d
022 $a0034-4257
024 7 $ahttp://dx.doi.org/10.1016/j.rse.2012.11.009$2DOI
100 1 $aBROWN, J. C.
245 $aClassifying multiyear agricultural land use data from Mato Grosso using time-series MODIS vegetation index data.$h[electronic resource]
260 $c2013
520 $aMODIS 250-m NDVI and EVI datasets are now regularly used to classify regional-scale agricultural land-use practices in many different regions of the globe, especially in the state of Mato Grosso, Brazil, where rapid land-use change due to agricultural development has attracted considerable interest from researchers and policy makers. Variation exists in which MODIS datasets are used, how they are processed for analysis, and what ground reference data are used. Moreover, various land-use/land-cover classes are ultimately resolved, and as yet, crop-specific classifications (e.g. soy-corn vs. soy-cotton double crop) have not been reported in the literature, favoring instead generalized classes such as single vs. double crop. The objective of this study is to present a rigorous multiyear evaluation of the applicability of time-series MODIS 250-m VI data for crop classification in Mato Grosso, Brazil. This study shows progress toward more refined crop-specific classification, but some grouping of crop classes remains necessary. It employs a farm field polygon-based ground reference dataset that is unprecedented in spatial and temporal coverage for the state, consisting of 2003 annual field site samples representing 415 unique field sites and five crop years (2005-2009). This allows for creation of a dataset containing "best-case" or "pure" pixels, which we used to test class separability in a multiyear cross validation framework applied to boosted decision tree classifiers trained on MODIS data subjected to different pre-processing treatments. Reflecting the agricultural landscape of Mato Grosso as a whole, cropping practices represented in the ground reference dataset largely involved soybeans, and soy-based classes (primarily double crop 'soy-commercial' and single crop 'soy-cover') dominated the analysis along with cotton and pasture. With respect to the MODIS data treatments, the best results were obtained using date-of-acquisition interpolation of the 16-day composite VI time series and outlier point screening, for which five-year out-of-sample accuracies were consistently near or above 80% and Kappa values were above 0.60. It is evident that while much additional research is required to fully and reliably differentiate more specific crop classes, particular groupings of cropping strategies are separable and useful for a number of applications, including studies of agricultural intensification and extensification in this region of the world.
650 $aCotton
650 $aLand cover
650 $aSoybeans
650 $aAlgodão
653 $aÁrvore de decisão
653 $aCobetura vegetal
653 $aCross Validation
653 $aDecision tree
653 $aSementes de soja
653 $aSoybean
700 1 $aKASTENS, J. H.
700 1 $aCOUTINHO, A. C.
700 1 $aVICTORIA, D. de C.
700 1 $aBISHOP, C. R.
773 $tRemote Sensing of Environment$gv. 130, p. 39-50, 2013.
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Registro original: |
Embrapa Territorial (CNPM) |
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Registro Completo
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Biblioteca(s): |
Embrapa Suínos e Aves. |
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Data corrente: |
22/12/2015 |
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Data da última atualização: |
18/03/2016 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
DIAS, J. R.; KUNZ, A.; PRÁ. M. C. de; JACINTO, I. C.; VERUCK, M.; BASSO, B. |
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Afiliação: |
JESSICA ROSA DIAS, UNC; AIRTON KUNZ, CNPSA; MARINA CELANT DE PRÁ, UFSC; ISMAEL C. JACINTO, UNC; MARCOS VERUCK, UNC; BRUNA TAUANA BASSO, Universidade Tecnológica Federal do Paraná. |
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Título: |
Avaliação do comportamento de um reator de batelada sequencial para oxidação de nitrogênio amoniacal. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
In: JORNADA DE INICIAÇÃO CIENTÍFICA (JINC), 9., 2015, Concórdia. Anais... Brasília: Embrapa, 2015. p. 115-116. |
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Idioma: |
Português |
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Palavras-Chave: |
Eficiência de remoção; Nitritação parcial; Reator SBR. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/136044/1/final8059-1.pdf
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Marc: |
LEADER 00679nam a2200193 a 4500
001 2032215
005 2016-03-18
008 2015 bl uuuu u00u1 u #d
100 1 $aDIAS, J. R.
245 $aAvaliação do comportamento de um reator de batelada sequencial para oxidação de nitrogênio amoniacal.$h[electronic resource]
260 $aIn: JORNADA DE INICIAÇÃO CIENTÍFICA (JINC), 9., 2015, Concórdia. Anais... Brasília: Embrapa, 2015. p. 115-116.$c2015
653 $aEficiência de remoção
653 $aNitritação parcial
653 $aReator SBR
700 1 $aKUNZ, A.
700 1 $aPRÁ. M. C. de
700 1 $aJACINTO, I. C.
700 1 $aVERUCK, M.
700 1 $aBASSO, B.
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