Data/hora: 12/06/2024 05:06:30

Biblioteca(s): 	Embrapa Territorial.	
Data corrente: 	02/03/2009	
Data da última atualização: 	25/08/2014	
Autoria: 	LU, D.; BATISTELLA, M.; MIRANDA, E. E. de.	
Afiliação: 	DENGSHENG LU, Indiana University; MATEUS BATISTELLA, CNPM; EVARISTO EDUARDO DE MIRANDA, CNPM.	
Título: 	A comparative study of landsat TM and SPOT HRG images of vegetation classification in the brazilian Amazon.	
Ano de publicação: 	2008	
Fonte/Imprenta: 	Photogrammetric Engineering & Remote Sensing, v. 74, n. 3, p. 311-321, mar. 2008.	
Volume: 	v. 74	
ISBN: 	0099-1112	
Idioma: 	Inglês	
Conteúdo: 	Complex forest structure and abundant tree species in the moist tropical regions often couse difficulties in classifying vegetation classes with remotely sensed data. This paper explores improvement in vegetation classification accuracies through a comparative study of different image combinations based on the integration of Landsat Thematic Mapper (TM) and SPOT High Resolution Geometric (HRG) instrument data, as well as the combination of spectral signatures and textures. A maximum likelihood classifier was used to classify the different image combinations into thematic maps. This research indicated that data fusion based on HBG multispectral and panchromatic data slightly improved vegetation classification accuracies: a 3.1 to 4.6 percent increase in the kappa coefficient compared with the classification results based on original HRG of TM multispectral images. A combination of HRG spectral signatures and two textural images improved the kappa coefficient by 6.3 percent compared with pure HRG multispectral images. The textural images based on entropy or second-moment texture measures with a window size of 9 pixels X 9 pixels played an important role in improving vegetation classification accuracy. Overall, optical remote-sensing data are still insufficient for accurate vegetation classifications in the Amazon basin.	
Palavras-Chave: 	Brazilian Amazon; Comparative study; Landsat TM and SPOT HRG Images; Machadinho d´Oeste; Moist tropical regions.	
Categoria do assunto: 	P Recursos Naturais, Ciências Ambientais e da Terra	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/107253/1/2284.pdf	
Registro original: 	Embrapa Territorial (CNPM)	
Exemplares: 	CNPM - (2284-1) - UPC - AP - PP - 08/066 - AP - 2008.066 - DIS