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Proceedings Paper

Vegetation mapping in the Parque Nacional, Brasilia (Brazil) area using advanced spaceborne thermal emission and reflection radiometer (ASTER) data and spectral identification method (SIM)
Author(s): Osmar Abílio de Carvalho Júnior; Renato Fontes Guimarães; Ana Paula Ferreira de Carvalho; Nilton Correia da Silva; Eder de Souza Martins; Roberto Arnaldo Trancoso Gomes
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Paper Abstract

The spectral classifiers allow a good estimate for the mapping of the materials from the similarity between the reference curve and the image. Initially the spectral classifiers had been developed for hyperspectral images analysis. However, some works demonstrate good results for the application of these techniques in multispectral images. The present work aims to evaluate the spectral classifier Spectral Identification Method (SIM) in ASTER image. The Spectral Identification Method (SIM) is proposed to establish a new similarity index and three estimates according to the significance of regression (5%, 10% and 15%) of the materials. This method is based on two statistical procedures: ANOVA and Spectral Correlation Mapper (SCM) coefficient. This information can be used to evaluate the degree of correlation among the materials in analysis. The advantage of this method is to validate according to significance of regression most probable areas of the sought material. The method was applied to ASTER image at the Parque Nacional (DF - Brazil). The images were acquired with atmosphere correction. The pixels size from the SWIR image was duplicated in order to join the VNIR and SWIR images. Endmembers were detected in three steps: a) spectral reduction by the Minimum Noise Fraction (MNF), b) spatial reduction by the Pixel Purity Index (PPI) and c) manual identification of the endmembers using the N-dimensional visualizer. The classification was made from the endmembers of nonphotosynthetic vegetation (NPV), photosynthetic vegetation (PV) and soil. These procedures allowed identifying the main scenarios in the study area.

Paper Details

Date Published: 31 October 2005
PDF: 11 pages
Proc. SPIE 5983, Remote Sensing for Environmental Monitoring, GIS Applications, and Geology V, 598307 (31 October 2005); doi: 10.1117/12.627749
Show Author Affiliations
Osmar Abílio de Carvalho Júnior, Univ. Darcy Ribeiro (Brazil)
Renato Fontes Guimarães, Univ. Darcy Ribeiro (Brazil)
Ana Paula Ferreira de Carvalho, Univ. Darcy Ribeiro (Brazil)
Nilton Correia da Silva, Univ. Evangélica de Anapólis (Brazil)
Eder de Souza Martins, EMBRAPA Cerrados (Brazil)
Roberto Arnaldo Trancoso Gomes, Univ. Federal do Rio de Janeiro (Brazil)


Published in SPIE Proceedings Vol. 5983:
Remote Sensing for Environmental Monitoring, GIS Applications, and Geology V
Manfred Ehlers; Ulrich Michel, Editor(s)

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