High spatial resolution land use and land cover mapping of the Brazilian Legal Amazon in 2008 using Landsat-5/TM and MODIS data
Understanding spatial patterns of land use and land cover is essential for studies addressing biodiversity, climate change and environmental modeling as well as for the design and monitoring of land use policies. The aim of this study was to create a detailed map of land use land cover of the defore...
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Veröffentlicht in: | Acta amazonica 2016-09, Vol.46 (3) |
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Zusammenfassung: | Understanding spatial patterns of land use and land cover is essential for studies addressing biodiversity, climate change and environmental modeling as well as for the design and monitoring of land use policies. The aim of this study was to create a detailed map of land use land cover of the deforested areas of the Brazilian Legal Amazon up to 2008. Deforestation data from and uses were mapped with Landsat-5/TM images analysed with techniques, such as linear spectral mixture model, threshold slicing and visual interpretation, aided by temporal information extracted from NDVI MODIS time series. The result is a high spatial resolution of land use and land cover map of the entire Brazilian Legal Amazon for the year 2008 and corresponding calculation of area occupied by different land use classes. The results showed that the four classes of Pasture covered 62% of the deforested areas of the Brazilian Legal Amazon, followed by Secondary Vegetation with 21%. The area occupied by Annual Agriculture covered less than 5% of deforested areas; the remaining areas were distributed among six other land use classes. The maps generated from this project - called TerraClass - are available at INPE's web site (http://www.inpe.br/cra/projetos_pesquisas/terraclass2008.php).Ori ginal Abstract: Entender o padrao espacial do uso e cobertura da terra e essencial para estudos de biodiversidade, mudancas climaticas e modelagem ambiental, bem como para concepcao e acompanhamento de politicas direcionadas ao uso da terra. O objetivo deste estudo foi criar um mapa detalhado do uso e cobertura da terra para a porcao desflorestada da Amazonia Legal Brasileira, ate 2008. Dados de desflorestamento e uso foram mapeados usando imagens Landsat-5/TM analisadas com tecnicas como modelo linear de mistura espectral, fatiamento e interpretacao visual, auxiliados por informacoes temporais de NDVI extraidas de serie temporal de dados MODIS. O resultado deste estudo e um mapa de uso e cobertura da terra com alta resolucao espacial para toda Amazonia Legal Brasileira, para o ano de 2008, e os respectivos percentuais da area ocupada por diferentes classes de uso da terra. O resultado mostrou que, quatro classes de pastagens cobrem 62% da area desflorestada da Amazonia Legal Brasileira, seguida pela vegetacao secundaria com 21%. A area ocupada pela agricultura anual cobriu menos de 5% das areas desflorestadas; as areas restantes estavam distribuidas em outras seis classes de uso da terra. Os mapas ge |
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ISSN: | 0044-5967 1809-4392 |
DOI: | 10.1590/1809-4392201505504 |