Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/65653
Type: Artigo de periódico
Title: Estimation of summer crop areas in the state of Parana, Brazil, using multitemporal EVI/Modis images
Author: Johann, JA
Rocha, JV
Duft, DG
Lamparelli, RAC
Abstract: The objective of this work was to estimate and map crop areas with soybean and corn in the state of Parana, Brazil, using EVI/Modis images. The crop seasons from 2004/2005 to 2007/2008 were evaluated. Due to the high temporal dynamics and difference in sowing dates of the cultures within the state, scenes containing the pre-planting and initial crop development phases were used to obtain the minimum EVI image (IMIE), and scenes at the peak of the crop cycle were used to obtain the maximum EVI image (IMAE). These images were used to generate the RGB color composition (R, IMAE; GB, IMIE), which allowed for the creation of masks of the areas planted with soybean and corn. The estimation of masked areas by municipality was compared with the municipal agricultural production official data, and good fits (R-2>0.84, d>0.95, c>0.85) were observed between data. For spatial accuracy assessment, Landsat-5/TM and AWiFS/IRS images were used as references to build the error matrix. The obtained results indicate that the proposed methodology is highly efficient and may be used as a model for cropland mapping.
Subject: image classification
crop spatial distribution
vegetation index
mapping
crop forecast
remote sensing
Country: Brasil
Editor: Empresa Brasil Pesq Agropec
Rights: aberto
Date Issue: 2012
Appears in Collections:Unicamp - Artigos e Outros Documentos

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