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Provedor de dados:  Repositório Alice
País:  Brazil
Título:  Cropland area estimates using Modis NDVI time series in the state of Mato Grosso, Brazil.
Autores:  VICTORIA, D. de C.
PAZ, A. R. DA
COUTINHO, A. C.
KASTENS, J.
BROWN, J. C.
Data:  2012-11-23
Ano:  2012
Palavras-chave:  Cropland masks
Fourier
Cultivated area
Vegetation index
Resumo:  The objective of this work was to evaluate a simple, semi‑automated methodology for mapping cropland areas in the state of Mato Grosso, Brazil. A Fourier transform was applied over a time series of vegetation index products from the moderate resolution imaging spectroradiometer (Modis) sensor. This procedure allows for the evaluation of the amplitude of the periodic changes in vegetation response through time and the identification of areas with strong seasonal variation related to crop production. Annual cropland masks from 2006 to 2009 were generated and municipal cropland areas were estimated through remote sensing. We observed good agreement with official statistics on planted area, especially for municipalities with more than 10% of cropland cover (R2 = 0.89), but poor agreement in municipalities with less than 5% crop cover (R2 = 0.41). The assessed methodology can be used for annual cropland mapping over large production areas in Brazil.

2012
Tipo:  Artigo em periódico indexado (ALICE)
Idioma:  Inglês
Identificador:  3433

http://www.alice.cnptia.embrapa.br/handle/doc/940360

http://ainfo.cnptia.embrapa.br/digital/bitstream/item/70654/1/VictoriaPAB.pdf
Editor:  Pesquisa Agropecuária Brasileira, Brasilia, DF, v. 47, n. 9, p. 1270-1278, set. 2012.
Relação:  Embrapa Monitoramento por Satélite - Artigo em periódico indexado (ALICE)
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