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Registros recuperados: 5
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A land cover map of South America. Repositório Alice
EVA, H. D.; BELWARD, A. D.; MIRANDA, E. E. de; DI BELLA, C. M.; GONDS, V.; HUBER, O.; JONES, S.; SGRENZAROLI, M.; FRITZ, S..
A digital land cover map of South America has been produced using remotely sensed satellite data acquired between 1995 and the year 2000. The mapping scale is defined by the 1 km spatial resolution of the map grid-cell. In order to realize the product, different sources of satellite data were used, each source providing either a particular parameter of land cover characteristic required by the legend, or mapping a particular land cover class. The map legend is designed both to fit requirements for regional climate modelling and for studies on land cover change. The legend is also compatible with a wider, global, land cover mapping exercise, which seeks to characterize the world?s land surface for the year 2000. As a first step, the humid forest domain has...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Amazonia; Ecosystems; Land cover; Mapping; South America; Vegetation classes.
Ano: 2004 URL: http://www.alice.cnptia.embrapa.br/handle/doc/17218
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A vegetations map of south America. Infoteca-e
EVA, H. D.; MIRANDA, E. E. de; Di BELLA, C. M.; GOND, V.; HUBER, O.; SGRENZAROLI, M.; JONES, S..
2002
Tipo: Outras publicações técnicas (INFOTECA-E) Palavras-chave: Vegetation.
Ano: 2002 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/659881
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Forest Cover Changes in Tropical South and Central America from 1990 to 2005 and Related Carbon Emissions and Removals. Repositório Alice
EVA, H. D.; ACHARD, F.; BEUCHLE, R.; MIRANDA, E. E. de; CARBONI, S.; SELIGER, R.; VOLLMAR, M.; HOLLER, W. A.; OSHIRO, O. T.; ARROYO, V. B.; GALLEGO, J..
This paper outlines the methods and results for monitoring forest change and resulting carbon emissions for the 1990-2000 and 200-2005 periods carried out over tropical Central and South America. To produce our forest change estimates we used a systematic sample of medium resolution satellite data processed to forest change maps covering 1230 sites of 20 km by 20 km, each located at the degree confluence. Biomass data were spatially associated to each individual sample site so that annual carbon emissions could be estimated. For our study area we estimate that forest cover in the study area had fallen from 763 Mha (s.e. 10 Mha) in 1990 to 715 Mha (s.e. 10 Mha) in 2005. During the same period other wooded land (i.e., non-forest woody vegetation) had fallen...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Carbon emissions; Deforestation; Tropics; Remote sensing; Monitoring.
Ano: 2012 URL: http://www.alice.cnptia.embrapa.br/handle/doc/924822
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Global tropical forest cover change assessment with medium spatial stellite imagery using a systematic sample grid - data, methods and first results. Repositório Alice
BEUCHLE, R.; EVA, H. D.; MIRANDA, E. E. de; HOLLER, W. A.; OSHIRO, O. T.; ACHARD, F..
At the Joint Research Centre (JRC) of the European Commission, a methodology has been developed to monitor the pan-tropical forest cover with remote sensing data for the years 1990-2000-2005 in Latin America, Southeast Asia and Africa on the basis of over 4000 sample units sample units with a dimension of 20 km by 20 km located at every full latitude and longitude degree confluence. From the Landsat Thematic Mapper (TM) and Enhanced Thematic Mapper (ETM) instruments, images with low cloud impact from the epochs around the years 1990, 2000 and 2005 were selected and subsets covering the sample units were cut-out, pre-processed, segmented and classified in five different land cover classes in order to build global and regional statistics on tropical forest...
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Tropical forest cover; Monitoring; Landsat; Object-based classification.
Ano: 2011 URL: http://www.alice.cnptia.embrapa.br/handle/doc/902317
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Land cover changes in the Brazilian Cerrado and Caatinga biomes from 1990 to 2010 based on a systematic remote sensing sampling approach Repositório Alice
BEUCHLE, R.; GRECCHI, R. C.; SHIMABUKURO, Y. E.; SELIGER, R.; EVA, H. D.; SANO, E. E.; ARCHARD, F..
Abstract - The main objective of our study was to provide consistent information on land cover changes between the years 1990 and 2010 for the Cerrado and Caatinga Brazilian seasonal biomes. These areas have been overlooked in terms of land cover change assessment if compared with efforts in monitoring the Amazon rain forest. For each of the target years (1990, 2000 and 2010) land cover information was obtained through an object-based classification approach for 243 sample units (10 km × 10 km size), using (E)TM Landsat images systematically located at each full degree confluence of latitude and longitude. The images were automatically pre-processed, segmented and labelled according to the following legend: Tree Cover (TC), Tree Cover Mosaic (TCM), Other...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Land cover change; Sampling approach; Caatinga; Cerrado; Cobertura do solo; Desmatamento; Sensoriamento remoto; Cerrado; Deforestation; Remote sensing.
Ano: 2015 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1036231
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