Technology and Methodology |
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THE ASSESSMENT OF FUSED IMAGE OF ETM+ AND SPOT 5 PAN IN THE INVESTIGATION OF GEOLOGICAL HAZARDS |
LI Hong-jie, DAI Fu-chu, XU Ling, LI Wei-chao, YAO Xin |
Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China |
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Abstract Remote sensing, as an earth-observing tool, is a cost-effective technique for field investigation of
geological hazards. The study area and the reservoir area of a hydropower station located on the upstream of the
Jinshajiang River are characterized by high relief and inaccessibility, and hence ETM+ and SPOT-5 Pan were used as
the remote sensing data source, and Brovey, IHS and PCA transformation methods were adopted for image fusion. It is
concluded that PCA is the best image-fusing method for geological hazard interpretation, and that the fused image
can provide abundant textural and spectral information for easy interpretation of such geological hazards as
landslides, rock falls and debris flows.
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Issue Date: 13 July 2009
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