Data/hora: 02/06/2024 04:41:03

Provedor de dados: 	86	
País: 	Brazil	
Título: 	Cropland area estimates using Modis NDVI time series in the state of Mato Grosso, Brazil	
Autores: 	Victoria,Daniel de Castro; Paz,Adriano Rolim da; Coutinho,Alexandre Camargo; Kastens,Jude; Brown,J. Christopher.	
Data: 	2012-09-01	
Ano: 	2012	
Palavras-chave: 	Cropland masks; Cultivated area; Fourier; 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.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000900012	
Editor: 	Embrapa Secretaria de Pesquisa e Desenvolvimento

Pesquisa Agropecuária Brasileira	
Relação: 	10.1590/S0100-204X2012000900012	
Formato: 	text/html	
Fonte: 	Pesquisa Agropecuária Brasileira  v.47 n.9 2012	
Fonte: 	info:eu-repo/semantics/openAccess