Deriving refined land-cover information for the core Cerrado region based on the analysis of combined satellite and agricultural census data
Nemayer, Federal University of Goias, email@example.com
Ferreira, Federal University of Goias, firstname.lastname@example.org
Potter, NASA AMES, email@example.com
Bustamante, University of Brasilia, firstname.lastname@example.org
Recent estimations show that about 47% of the Cerrado biome has been already converted. Most of this conversion has taken place in the last 40 years, mainly in the State of Goias, the only State thoroughly located within the Cerrado limits. According to the most updated land use / land cover map available, based on 2001-2002 Landsat data, agriculture fields and pastures occupy approximately 18 and 45% of the State, respectively. Although this information is instrumental in assessing environmental impacts and trends at regional scales, detailed information on the spatial distribution of the distinct agricultural systems are still needed for accurate and precise estimations of CO2 and trace gases fluxes. Thus, in this study, thematic information based on satellite imagery was combined with 2001 - 2005 IBGE agricultural surveys at the municipality level in order to derive geographically explicit land cover information. Such analysis provided a new insight on the temporal and spatial dynamics of the dominant agriculture classes in the State of Goias at the landscape scale, which will certain contribute to improved biophysical models.