Abstract: The authors study on application of DGPS method and SPOT-5 across-stereo track images for geomorphology research in origin of Minjiang River, west Sichuan Province. DGPS method is used to get 22 ground control points, 15 check points and 1 check terrain profile during fieldwork. SPOT-5 images are used to extract 2.5 meter high resolution DEM and related orthorectification images based on fieldwork. DEM checking methods are used to assess its accuracy, tectonic geomorphology information such as river terraces. Valley morphology and disasters’ distribution are extracted on this basis. The authors demonstrate that methods of using a small amount of DGPS ground control points and SPOT-5 stereo images are available to give the DEM and orthorectification images to satisfy the active fault mapping and related tectonic geomorphology research.

Key words: SPOT-5, DGPS method, across-track stereo images, DEM, tectonic geomorphology, origin of Minjiang River

摘要： 以川西岷江源一带为研究区, 利用DGPS方法获取野外校正点和验证点, 应用SPOT-5异轨立体像对数据生成分辨率为2.5 m的DEM数据和相应的正射影像。获取野外测量校正点22个, 验证点15个, 实测剖面1条。使用检查点法和剖面检查法进行数据质量评价, 进一步获取岷江断裂带沿线的岷江河谷横剖面形态及河流阶地等详细的构造地貌信息。研究表明, 利用DGPS在获取少量野外校正点的基础上, 可生成用于活动构造及构造地貌详细研究的高质量DEM和正射影像。

关键词: SPOT-5, DGPS方法, 异轨立体像对, 数字高程模型, 构造地貌, 岷江源