1:10000DEM生产工艺改进方法研究和应用  

Methods Search and Application of the Improved Work Flow of 1:10000 DEM Production

作　　者：祝晓坤[1] 岳京宪[1] 李鸣[1] 

机构地区：[1]北京市测绘设计研究院,北京100038

出　　处：《北京测绘》2007年第3期1-4,18,共5页Beijing Surveying and Mapping

摘　　要：归纳了基于ArcGIS平台,利用地形图数据库生产1:10000DEM的工艺流程。并从以下两方面对DEM生产工艺流程进行改进:一、首次提出采用距离权法自动内插生成三维(3D)特征线,有效减少、甚至消除构TIN产生的"平台效应";二、针对生成的DEM数据,文中还提出一种大样本自动采样的精度评价方法,减少人工检查工作量。试验证明改进工艺流程能有效提高作业效率,改善DEM产品精度,使DEM产品更贴合实际地形,可用于DEM数据的快速生产。In this paper, the work flow of producing 1：10000 DEM（Digital Elevation Model） with topographic data based on ArcGIS platform is summarized. Furthermore, the work flow is improved from two aspects： on one hand, a distance add-weight method used to acquiring three dimension feature lines is firstly proposed to reduce or even eliminate the ＂platform effection＂ of DEM data. On the other hand, for produced DEM data, a new assessment method of automatic resampling is proposed to reduce artificial checking workload. According to experiments, this improving work flow can effectively improved efficiency and accuracy,makes DEM production joints actual terrain and this work flow can be applied to rapid production of DEM data.

关 键 词：地形要素 DEM精度评价 ARCGIS 

分 类 号：P208[天文地球—地图制图学与地理信息工程]