Analysis of Land Cover Changes of a Cerrado (Tropical Savanna) Area in the Centre-West of Brazil

Roberto Macedo Gamarra, Thiago da Silva Ferreira, Kennedy Francis Roche, Humberto José Sepa de Matos Filho, Thais Gisele Torres Catalani, Teresa Cristina Stocco Pagotto, Antonio Conceição Paranhos Filho

Abstract


The objective of the present work was to carry out an analysis of the land cover of an area in the centre-west of Brazil, at two different times, in 1966 and 2001, using a satellite image and a topographic map, in the Geographic Information System (GIS) environment. The 1966 land cover map was obtained by vectorizing the SE-22-Y-A-V topographic map (IBGE), while the 2001 land cover map was obtained from supervised automatic classification of the Landsat image ETM+ satellite orbit/point 224/073 of August 2001. The analysis showed alterations from natural cover to anthropogenic. In 1966, natural cover was 90% or more (principally true cerrado and forest), while in 2001, natural cover had decreased to 24%, being replaced by arable land and primarily grassland.

Keywords


Land cover; Cerrado; Satellite images; Temporal analysis

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DOI: https://doi.org/10.11137/2016_1_76_90

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