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《Acta Geologica Sinica》 2005-03
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Digital Processing and Information Extraction of the SPOT, ERS-SAR, Radarsat and Landsat TM Images for Geological Hazard in the Yangtze Three Gorges Project Region, China

YANG Wunian 1), PU Guoliang 1,2), CAUNEAU F 3), RANCHIN T 3), PARIS J P 4) 1) Institute of of RS & GIS, Chengdu University of Technology, Chengdu,610059, P. R. China; 2) Institute of RS &GIS, Bejing University, Beijing, 100871; 3) Centre d'Energétique, Groupe Télédétection et Modélisation, Ecole des Mines de PARIS, BP. 207, F-06904 Sophia Antipolis Cedex, France. 4) GDTA. Parc Technologique du Canal 8~10 Rue Hermes. F-31526 Ramonville-St Agne Cedex, France  
Multi-temporal SPOT images, ERS-SAR image, Radarsat images and Landsat TM images were applied in the study. The ARSIS method was mainly used to make fusion of the SPOT XS and Panchromatic images, achieving high quality of image results. many new geological, structural features and hazard phenomenon are found, achieving remarkable results: (1) An orthophotomap is a new type of map that is accurately corrected for geometry and is composed with a simplified topographic map. In this study, fusion of Landsat TM, SPOT and ERS SAR images was done. Then utilizing RS-OrthoMapper v1.0 software, which was explored by the authors, three kinds of orthophotomap were made, which were respectively 1:250000 map of Kaixian, 1:100000 map of Baishahe and 1:50000 map of Yunyangxian. The last one is an orthophotomap of fusion image of TM453 and SPOT panchromatic band, whose ground resolution is 10 meter, and DEM used in the rectification come from SPOT stereopairs.(2) In the study of Wanxian—Yunyang district, through fusion's of the Landsat TM 4,5,3 images and SPOT P image, a lot of the best image results with high spatial resolution of 10m and being affluent in colors were obtained. With the method of 3D-visualizing of remote sensing images and imaging dynamical analysis, 3D-visualizing maps of landslides and the landform relief, with a high resolution RS image and being projected from different directions, were established. With which, quantitative analysis as extracting information of landslides, drawing a section of landform and detecting DEM of some objects can be done directly and rapidly.(3) In the study of Wanxian—Wushan test region, with the theory and method of phase-separation analysis of remote sensing information field, which was proposed by the authors, geological and structural features were systematically interpreted with remote sensing images and the linear and circular structures were quantitatively analyzed. With a synthesizing analysis of the combined folds, faults and related major joint systems, four periods of structural deformation and the resulted deformation fields were determined. As a result, four tectonic stress fields were recovered.
【Fund】: 教育部“骨干教师培养基金”;; 高等学校博士学科点专项科研基金项目(编号20040616009)资助的成果
【CateGory Index】: P694
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