摘要
夷平面是当代地貌学研究的一个重要课题之一， 对于重建一个地区的地貌演化的历史具有重要的意义。文中利用遥感与地理信息系统技术， 建立了位于兰州以南、青藏高原东北部边缘的美武高原数字高程模型， 并与陆地卫星影像结合起来进行集成分析， 论述了美武高原三维地貌影像图的信息特点， 提取了若干区段的地形剖面， 进而在分析了高原夷平面地貌参数体系的基础上运用遥感图像监督分类技术自动提取出高原夷平面的具体分布区域。
Planation Surface is one of the very important issues in the field of current geomorphology, and plays a major role for reconstructing the evolutional history of land from in a region. By using remote sensing and geographical information systems, this article discussed the creation of the Digital Elevation Model (DEM) of the Meiwu Plateau, at the south of Lanzhou and the northeastern margin of the Qinghai-Xizang Plateau, and the integration of both DEM and Landsat TM images. Then the characteristics of 3D Geomorphological Imagery of the Meiwu Plateau were discussed, and the topographic profiles at several parts of the DEM were got. On the basis of analyzing the system of geomorphological parameters on the planation surface, the exact extent of the planation surface on the Meiwu Plateau was got by using the supervised classification technique in the field of image processing. The great potential of this technique was discovered on the analysis of planation.
出处
《地理研究》
CSCD
北大核心
1999年第4期391-399,共9页
Geographical Research
基金
国家自然科学基金! (49771015 和49301004
关键词
夷平面
青藏高原
貌影像图
定量分析
planation surface
Digital Elevation Model (DEM)
The Qinghai-Xizang Plateau
3D Geomorphological Imagery
supervised classification
