Data/hora: 02/06/2024 01:28:04

Biblioteca(s): 	Embrapa Agricultura Digital; Embrapa Territorial; Embrapa Unidades Centrais.	
Data corrente: 	23/11/2012	
Data da última atualização: 	23/11/2012	
Autoria: 	VICTORIA, D. de C.; PAZ, A. R. DA; COUTINHO, A. C.; KASTENS, J.; BROWN, J. C.	
Afiliação: 	DANIEL DE CASTRO VICTORIA, CNPM; ADRIANO ROLIM DA PAZ, UNIVERSIDADE FEDERAL DA PARAÍBA; ALEXANDRE CAMARGO COUTINHO, CNPTIA; JUDE KASTENS, KANSAS APPLIED REMOTE SENSING; J. CHRISTOPHER BROWN, UNIVERSITY OF KANSAS.	
Título: 	Cropland area estimates using Modis NDVI time series in the state of Mato Grosso, Brazil.	
Ano de publicação: 	2012	
Fonte/Imprenta: 	Pesquisa Agropecuária Brasileira, Brasilia, DF, v. 47, n. 9, p. 1270-1278, set. 2012.	
Idioma: 	Inglês	
Conteúdo: 	The objective of this work was to evaluate a simple, semi&#8209;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.	
Palavras-Chave: 	Área cultivada; Cropland masks; Cultivated area; Fourier; Índice de vegetação; Máscara de culturas; Transformada de Fourier.	
Thesaurus Nal: 	Vegetation index.	
Categoria do assunto: 	--	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/70654/1/VictoriaPAB.pdf
http://ainfo.cnptia.embrapa.br/digital/bitstream/item/76416/1/coutinho-pab.pdf	
Registro original: 	Embrapa Territorial (CNPM)	
Exemplares: 	CNPM - (3433-1) - UPC - AP - PP - 12/050 - AP - 2012.050 - DIS
CNPTIA - (17194-1) - UPC - AP - DD -  -  -  - DIS
AI-SEDE - (54081-1) - UPE - AP - PP - 630.72081 - P474 -  - DIS