DEM地形描述误差场量化分析研究  

Quantitative Analysis of DEM Terrain Representation Error Field

作　　者：王春[1] 汤国安[2] 戴仕宝[1] 江岭[2] 王靖[1] 

机构地区：[1]滁州学院地理信息与旅游学院,安徽滁州239000 [2]南京师范大学虚拟地理环境教育部重点实验室,江苏南京210046

出　　处：《武汉大学学报（信息科学版）》2014年第9期1074-1079,共6页Geomatics and Information Science of Wuhan University

基　　金：国家自然科学基金资助项目(41001301;40930531;41201415);国家教育部科学技术研究重点资助项目(212078);安徽省高校省级自然科学基金重点资助项目(KJ2010A250)~~

摘　　要：借鉴误差椭圆和ε误差带建模思想,提出了DEM地形描述误差(简称为Et)的中误差场和极值场(统称为Et场)模型,研究建立了Et场的构建方法,并以平原河网、黄土丘陵、秦岭山地等为例,采用比较分析方法研究了Et场的基本特征。Based on the modeling of error ellipses and ε error bands, we present a model for the Et field which includes REM field and the extremum field, where Et is the DEM terrain representation error. Then, a construction method of Et field is established. Taking the terrain of plain river network, loess hill and Qinling mountains as test data, we analyze the basic characteristics of the Et field by a comparative analysis method. Experimental results show Experimental results show the conclusions as follows： （1） the Et field could reflect the spatial distribution of DEM terrain representation error intu- itively and accurately and deserves to research. （2） Et is closely related to the landform complexity of the area presented by DEM and presents significant spatial structure distribution characteristics. Meanwhile, RMS of Et shows a feature of the curve with the resolution of DEM increasing. （3） As the unoptimistic accuracy of existing RMS estimation models of Et, the quantitative simulation of the regional topographic complexity should be completed scientifically and accurately at first to achieve the high-accuracy RMS estimation of Et.

关 键 词：DEM 地形描述误差 误差场 形态精度 质量分析 

分 类 号：P208[天文地球—地图制图学与地理信息工程]