青藏高原DEM的生成与应用  

Production and application on DEM of Tibetan Plateau

作　　者：邢宇[1] 姜琦刚[1] 王坤[1] 程彬[1] 李远华[1] 王耿明[1] 张红红[1] 

机构地区：[1]吉林大学地球探测科学与技术学院,长春130026

出　　处：《世界地质》2007年第4期479-483,共5页World Geology

基　　金：青藏高原生态地质环境遥感调查与监测项目(200315100002)

摘　　要：数字高程模型(DEM)不仅可以实现三维地形可视化,而且还能由其进一步获得与高程有关的地形要素。针对青藏高原DEM生成和应用过程中碰到的数据量大、区域广阔、应用难度大等问题,本文给出了相应的解决方案,提出一套DEM制作和应用流程:以1∶25万地形图矢量等高线数据内插方式生成青藏高原DEM数据,在此基础上,运用Mask处理后相交分析思想与多级金字塔、DEM水淹分析、高程分带等处理技术实现了青藏高原三维地形可视化、三维遥感影像制作、及其它生态地质环境因素的变化分析。基于此方法生成的青藏高原DEM数据,不仅精度高,三维地形可视化效果好,而且解决了海量DEM数据与其它资料综合分析的问题。The Digital Elevation Model （DEM）, helps to realize three-dimensional terrain visualization, and to further access many terrain elements related DEM. Aiming at solving the problems such as abundant data, broader region and difficulty in application during the process of production and application on DEM of Tibetan Plateau, a corresponding solution was put forward, which is a suit of making and applying process of DEM. The process is on the basis of the Tibetan Plateau DEM data by vector contour data interpolation methods with the scale of the topographic map 1 ： 250 000, and then the three-dimensional terrain visualization of Tibetan Plateau, the produce of 3D remote sensing image and other changing analysis of geological environment factors are realized, using production and application by applying the intersection and analysis thought after Mask handled and handling techniques including multilevel pyramid, DEM flooding analysis and topographic level slice handling, etc. The Tibetan Plateau DEM data based on the method is not only high in accuracy and of better three-dimensional terrain visualization effect but also resolving the problems of comprehensive analysis on massive DEM data and other information.

关 键 词：青藏高原 DEM 三维遥感 

分 类 号：TP75[自动化与计算机技术—检测技术与自动化装置]