Large area mapping of land-cover change in Rondônia using multitemporal spectral mixture analysis and decision tree classifiers
Dar A. Roberts,Izaya Numata,Karen Holmes,Getulio Teixeira Batista,T. Krug,A. Monteiro,B. Powell,Oliver A. Chadwick +7 more
TLDR
In this paper, a multistage process was used to map primary forest, pasture, second growth, urban, rock/savanna, and water using 33 Landsat scenes acquired over three contiguous areas between 1975 and 1999.Abstract:
[1] We describe spatiotemporal variation in land cover over 80,000 km2 in central Rondonia. We use a multistage process to map primary forest, pasture, second growth, urban, rock/savanna, and water using 33 Landsat scenes acquired over three contiguous areas between 1975 and 1999. Accuracy of the 1999 classified maps was assessed as exceeding 85% based on digital airborne videography. Rondonia is highly fragmented, in which forests outside of restricted areas consist of numerous, small irregular patches. Pastures in Rondonia persist over many years and are not typically abandoned to second growth, which when present rarely remains unchanged longer than 8 years. Within the state, annual deforestation rates, pasture area, and ratio of second growth to cleared area varied spatially. Highest initial deforestation rates occurred in the southeast (Luiza), at over 2%, increasing to 3% by the late 1990s. In this area, the percentage of cleared land in second growth averaged 18% and few pastures were abandoned. In central Rondonia (Ji-Parana), deforestation rates rose from 1.2% between 1978 and 1986 to a high of 4.2% in 1999. In the northwest (Ariquemes), initial deforestation rates were lowest at 0.5% but rose substantially in the late 1990s, peaking at 3% in 1998. The ratio of second growth to cleared area was more than double the ratio in Luiza and few pastures remained unchanged beyond 8 years. Land clearing was most intense close to the major highway, BR364, except in Ariquemes. Intense forest clearing extended at least 50 km along the margins of BR364 in Ji-Parana and Luiza. Spatial differences in land use are hypothesized to result from a combination of economic factors and soil fertility.read more
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Hyperspectral discrimination of tropical rain forest tree species at leaf to crown scales
TL;DR: In this paper, the authors investigated the utility of high spectral and spatial resolution imagery for the automated species-level classification of individual tree crowns (ITCs) in a tropical rain forest (TRF).
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Reconstructing Three Decades of Land Use and Land Cover Changes in Brazilian Biomes with Landsat Archive and Earth Engine
Carlos Souza,Julia Z. Shimbo,Marcos R. Rosa,Leandro Parente,Ane Alencar,Bernardo Friedrich Theodor Rudorff,Heinrich Hasenack,Marcelo Matsumoto,Laerte Guimarães Ferreira,Pedro Walfir M. Souza-Filho,Sergio W. de Oliveira,Washington de Jesus Sant'Anna da Franca Rocha,Antônio V. Fonseca,Camila B. Marques,Cesar Guerreiro Diniz,Diego Pereira Costa,Dyeden Monteiro,Eduardo R. Rosa,Eduardo Vélez-Martin,Eliseu Jose Weber,Felipe E. B. Lenti,Fernando F. Paternost,Frans G. C. Pareyn,João V. Siqueira,José L. Viera,Luiz C. Ferreira Neto,Marciano Saraiva,Marcio H. Sales,Moises Pereira Galvao Salgado,Rodrigo Antunes de Vasconcelos,Soltan Galano,Vinícius Vieira Mesquita,Tasso Rezende de Azevedo +32 more
TL;DR: A novel approach and the results achieved by a multi-disciplinary network called MapBiomas to reconstruct annual land use and land cover information between 1985 and 2017 for Brazil, based on random forest applied to Landsat archive using Google Earth Engine are described.
Journal ArticleDOI
Endmember selection for multiple endmember spectral mixture analysis using endmember average RMSE
TL;DR: In this paper, a method of selecting endmembers from a spectral library for use in multiple endmember spectral mixture analysis (MESMA) was presented, which was used to map land cover in the Santa Ynez Mountains above Santa Barbara, CA, USA.
Journal ArticleDOI
Regional ecosystem structure and function: ecological insights from remote sensing of tropical forests.
Jeffrey Q. Chambers,Gregory P. Asner,Douglas C. Morton,Liana O. Anderson,Sassan Saatchi,Fernando Del Bon Espírito-Santo,Michael W. Palace,Carlos Souza +7 more
TL;DR: Issues that are addressed here include forest response to altered precipitation regimes, regional disturbance and land-use patterns, invasive species and landscape carbon balance.
Journal ArticleDOI
Linear mixture model applied to Amazonian vegetation classification
TL;DR: In this paper, a linear mixture model (LMM) approach was applied to classify successional and mature forests using Thematic Mapper (TM) imagery in the Rondonia region of the Brazilian Amazon.
References
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