基于拓扑模型的无边际区域研究与应用

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1、信息工程大学硕士学位论文AbstractAlong、柝t11thesocialprogressandtherapidadvancesofscientificandtechnologicalchanging、析theachnewday,thedevelopmentofinformationtechnologyhaspouredintothefreshbloodtovariouswalksoflife．Asanimportantcomponentofinformationsystems，GIStechnologyhasbeenappliedinvariousindustriesf

2、oralongtime．AstheemergenceofnewrequirementsinGISbroughtbymanyindustries，ithasalsobroughtupnewdemandsfortheofGIS，forexample：theandofenormousdata，theflexibilityoftheapplicationsstoragedisplaysystem，whetherthesystemsisopentoothersornot，InternetsolutionsandSOon．Thispaperanalyzedthepresentstatus

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4、tagewasconfirmedbyexamplesofGISapplicationsinthismanner．Intherealizationprocessoftheunlimitedregiondatadisplay,itinvolvesaseriesofveryimportanttechnologysuchasrestructuring，dataquery,multi—scalevisualization,LODtechnologyandSOon．Allthesehadbeenexploredandresearched．Itsmaincontentsincludesth

5、atasbelow：1、TobeginwiththepresentapplicationsituationoftheenormousGISdata，itanalyzedtheshortcomingsbycomparingthenumberofwell—knownapplicationsofiwares，thenshowedthemeaningofmakingtheresearchandbackgroundofthestudy．2、Tointerpretandanalyzethesystemdesignindetail，includingthedatastructureandi

6、ndexingmechanismdesign,geographicinformationresearchandachieverapidvisualizationmethods．3、Thekeytechnologyforthesystemtoexploreandresearch．4、ToconfirmtheadvantagesofGISapplicationsbasedonthissystem’Sdesign．Keyword：geographicinformationsystem(GIS)unlimitedregiondatatopologicmodeltopologicmod

7、elrecombinelevelofdetail(LOD)multi．scalesvisualization第4页信息工程大学硕士学位论文第一章绪论1．1引言地理信息系统(GeographicInformationSystem简称GIS)是一项以计算机为基础的新兴技术，围绕着这项技术的研究、开发和应用形成了一门交叉性、边缘性的学科，是管理和研究空间数据的技术系统，在计算机软硬件支持下，它可以对空间数据按地理坐标或空间位置进行各种处理，对数据进行有效管理，研究各种空间实体及相互关系。通过对多因素的综合分析