Data/hora: 02/06/2024 05:10:03

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