有关设计生成数字地面模型的几点建议英文.pdf

2002.3GIS技术遥感信息

GuidelinesforConceptionoftheDTMProjects
有关设计生成数字地面模型的几点建议

张伯兰,陈鹰
NtyameJeanChamplain,CHENYing

(同济大学测量系,上海200092)

Abstract:WithregardtotheeffectsthatinfluenttheprecisionoftheDTM,anumberofexperienceshas
beenmadeinthissenseandhasgivenpossibilitiestoassimilateallcontoursofthecrucialproblemofthe
precisionoftheDTMsperfectly.Theseexperienceshavebeenledbydifferentcentersandhavesucceeded
allmoreorlesstothesimilarresults.It'snowrecognizedbyunanimitythattheaccuracyoftheprimary
data,thedensityoftheprimarydata,thecharacteristicsoftheterrain,andthemodelingapproachesare
theprincipalfactorswhichaffectgreatlytheaccuracyoftheDTMs.Althoughthesefactorsacttogetheron
theprecisionoftheDTM,itiswhenweisolatethemandweanalyzethemthattheinfluenceofeachonthe
precisionoftheDTMisexposedclearly.
Thispaperanalysestheresultsofthemosttypicalexperiencesandoutlinesomeusefulsubjections
thatcanbeusedtoprepareareasonableprojectwhichwillassuretheefficiencyofthegenerationofDTM,
ofthepointofeconomicview,timeandquality.
Keywords:DTM,primarydatacollection,ModelingMethods

摘要:关于影响数字地面模型精度的因素问题,不同研究机构的科研人员进行过大量的实验研究,并成功获得了影响数
字地面模型精度的因素,研究成果有着或多或少的相近之处,普遍认为原始数据点的三个属性(精度、密度和分布),地形特征
以及建模方法是影响数字地面模型精度的主要因素。
本文分析了一些典型研究的成果,并列出一些建设性的提议,以提高数字地面模型生成过程中经济上、时间上和质量上
的效率。
关键字:数字地面模型;原始数据点的采集;建模方法
中图分类号:P2文献标识码:A文章编号:1000-3177(2002)67-041-05

geographicalinformationsystems,DigitalTerrain
1Introduction
Modelshavealsobecomeanimportantpartofa
Digitalterrainmodelsprovideessentialbasicnationalspatialdatainfrastructure.
informationforalltypesofengineeringtasksandBybecomingpartofanationalspatialdata
therelativeplanningactivities.Variousinfrastructure,DTMwillnotbegeneratedonlyto
applicationsfieldssuchasroadandrailwaysatisfytosomesmallareascoveringsomespecific
projects,tasksofruralengineering,floodcontrol,projectsasabovementioned,butalsotocovera
geology,militaryoperations,miningengineering,wholecountry.Forsuchalargeproject,
landscapearchitecture,andnumerousotherphotogrammetristwhoareusuallytheresponsible
activit