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ISSN : 2287-8327

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Vol.35 No.2
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Classification of tree species using high-resolution QuickBird-2 satellite images in the valley of Ui-dong in Bukhansan National Park

Journal of Ecology and Environment / Journal of Ecology and Environment, (P)2287-8327; (E)2288-1220
2012, v.35 no.2, pp.91-98


& (2012). Classification of tree species using high-resolution QuickBird-2 satellite images in the valley of Ui-dong in Bukhansan National Park. Journal of Ecology and Environment, 35(2), 91-98.
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Abstract

This study was performed in order to suggest the possibility of tree species classification using high-resolution Quick-Bird-2 images spectral characteristics comparison(digital numbers [DNs]) of tree species, tree species classification, and accuracy verification. In October 2010, the tree species of three conifers and eight broad-leaved trees were examined in the areas studied. The spectral characteristics of each species were observed, and the study area was classified by image classification. The results were as follows: Panchromatic and multi-spectral band 4 was found to be useful for tree species classification. DNs values of conifers were lower than broad-leaved trees. Vegetation indices such as normalized difference vegetation index (NDVI), soil brightness index (SBI), green vegetation index (GVI) and Biband showed similar patterns to band 4 and panchromatic (PAN); Tukey’s multiple comparison test was significant among tree species. However,tree species within the same genus, such as Pinus densiflora-P. rigida and Quercus mongolica-Q. serrata, showed similar DNs patterns and, therefore, supervised classification results were difficult to distinguish within the same genus; Random selection of validation pixels showed an overall classification accuracy of 74.1% and Kappa coefficient was 70.6%. The classification accuracy of Pterocarya stenoptera, 89.5%, was found to be the highest. The classification accuracy of broadleaved trees was lower than expected, ranging from 47.9% to 88.9%. P. densiflora-P. rigida and Q. mongolica-Q. serrata were classified as the same species because they did not show significant differences in terms of spectral patterns.

keywords
QuickBird, spectral characteristics, tree species classification, vegetation index

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