建立省级数字高程模型(DEM)的关键技术——以江苏省为例

文章以江苏省的DEM制作为例,介绍利用ARCINFO、ARCVIEW软件生成DEM的全过程中的关键技术。应用结果表明,可以快速查找出采编地形图信息过程中的错误,建立的DEM精度较高,更适合于水土流失的定量监测,显示了该技术方法的可行性。

Key Technique for Establishing Digital Elevation Model (DEM) at Provincial Scale--Case Study of Jiangsu Province

The map for producing DEM at provincial scale include mountains, plains, hills and crossing different projection zones, the data are very large, so careful preparation of data are needed to produce eligible DEM. Approaches of error control and some detailed methods are summarized in the paper. Key technique of finding errors and methods of establishing DEM of Jiangsu Province are introduced by using ARCINFO and ARCVIEW software. Results show that using the technique can quickly find errors in vector data. High precise DEM can be achieved by this method. The technique and method are feasible to establish eligible DEM for large areas at provincial scale. And the DEM established by this method is more suitable to apply in monitoring soil and water losses than other methods.