规则格网DEM地形综合方法分析  

Analysis of grid DEM terrain integrated methods

作　　者：徐静[1,2] 顾留碗[2] 张耀民[1] 韩光辉[2] 

机构地区：[1]西安科技大学测绘科学与技术学院,陕西西安710054 [2]滁州学院地理信息与旅游学院,安徽滁州239000

出　　处：《测绘工程》2014年第9期26-31,共6页Engineering of Surveying and Mapping

基　　金：安徽省高校省级自然科学基金重点项目(KJ2010A250);滁州学院优秀青年人才基金重点项目(2013rc009);国家级大学生创新创业训练计划(201310377013)

摘　　要：针对当前丰富多样的DEM地形综合模型,分类阐述其综合原理、关键技术及优缺点,以黄土丘陵1∶1万DEM为基础,对其地形综合效果进行对比分析。研究结果表明:现有的DEM地形综合模型各有优缺点;不同综合模型综合后的地形,高程数值随着综合尺度的增加,存在显著差异,而且不同综合模型对流域边界的综合处理也存在显著差异,没有形成客观有效的流域边界描述;当前困扰DEM地形综合的关键问题,是缺乏不同尺度下地形综合质量的客观评价标准,致使现有综合模型地形综合结果和DEM格网分辨率之间没有建立本应存在的内在联系,有待进一步深入研究。The synthetic principle, key technology, advantages and disadvantages of the current variety ot DEM terrain comprehensive models are expounded respectively. Taking 1 ： 10 000 DEM of loess hill as the base, it presents the topography comprehensive effect. The results show that the existing models of DEM terrain comprehensive models can be divided into sparse sampling, digital image processing, integrated structure, mathematical surface fitting, minimal visual element, of which has advantages and disadvantages. The elevation values of the terrain synthesized by different comprehensive models have obvious differences with the increase of the comprehensive scale. And the overall treatment of watershed boundaries by different comprehensive models also has significant differences, and there is no objective description on watershed boundaries. The current crucial problem that puzzles DEM terrain comprehensive models is lacking of objective evaluation criteria of the terrain comprehensive qualities on different scales, so that there is no internal link between topography comprehensive results of present comprehensive models and DEM grid resolution. So it deserves further study.

关 键 词：DEM 地形综合 序列尺度 空间数据质量 

分 类 号：P208[天文地球—地图制图学与地理信息工程]