简介：Ageographicinformationsystem(GIS)isahardware/softwaretoolwhichisveryeffectiveincollecting,storing,searching,handling,andvisualizinggeographicdatatogetherwiththeirdescriptiveattributes.Suchatoolisveryhelpfultoapproachawiderangeofsituations,includingmanylogisticproblems.ENEA,astheagencyhavingthetaskofimplementingtheItalianAntarcticProgram(PNRA),hasdecidedtouseaGIS,inordertoincreasetheefficiencyinmanagingthehugeamountofdatacollectedinthecourseofItalianactivityinAntarctica,whichcountsfifteenexpeditionsuptonow.

简介：阐述了传统GIS系统的不足及IntranetGIS系统的特点与组成内容,介绍了IntranetGIS系统建造时应注意的问题,同时提出了解决思路。

简介：简介组件式地理信息系统(ComGIS)的发展历史,介绍国内外组件式GIS的主要产品,使用特点,分析组件式GIS的特点、发展趋势.

简介：Inordertosetupaconceptualdatamodelthatreflectstherealworldasaccuratelyaspossible,thispaperfirstlyreviewsandanalyzesthedisadvantagesofpreviousconceptualdatamodelsusedbytraditionalGISinsimulatinggeographicspace,givesanewexplanationtogeographicspaceandanalyzesitsvariousessentialcharacteristics.Finally,thispaperproposesseveraldetailedkeypointsfordesigninganewtypeofGISdatamodelandgivesasimpleholisticGISdatamodel.

简介：ThedevelopmentofInternetprovidesconvenientenvironmentforinformationsearchingandbrowsing.Italsoofferssanewplatformforgeographicinformationprocessingandanalysis.ThispaperdiscussesorganizationandprocessingapproachtoInternetgeographicinformation,andprovidesanewmethodtocross-platformanddistributedgeographicinformationanditssoftwareimplementation.Theexampieisusedtoshowthepracticalityandsuperiorityofthismethod

简介：本文简述了ＧＩＳ在抗震规划过程中的应用，提出了系统目标、所包含的内容以及系统结构等问题。

简介：ThisworkhasoriginallybeendoneintheP.R.China(WuhanTechnicalUniversityofSurveyingandMapping)andinHongKong(ChineseUniversityofHongKong).Prof.LinHuigaveusefuladvice.Mr.HanHaiyang,andMs.ChenLilihelpedworkwiththeimplementationofprototypesystem.WealsothanktheSwissNationalScienceFoundationforitsfinancialsupportandacknowledgethecommentsofDr.AndreasGeppertandProf.KlausR.Dittrichonanearlierversionofthispaper.

简介：一、前言Internet技术的发展，对地理信息系统产生了深远影响。GIS与Internet技术的集成逐步成为GIS发展的重要方向之一，并已经产生了GoogleMap、图行天下等网络电子地图。但是GIS发展存在两个硬伤：专项GIS应用缺乏普通用户支持推广；公开GIS应用也因功能单一、附加信息量少、缺乏交互，所以少有吲头客。为了解决这两个问题，设想建立一种方便普通用户使用、信息量大、信息价值高、可以交互的GISVlog模型。

简介：本文简单介绍了虚拟现实技术，分析了虚拟现实中与地理信息系统(GIS)结合的有关技术，以及在WEB上发布的技术线路，重点阐述了如何应用0penGL建立三维景观再现和浏览操作，探讨了地理信息系统与虚拟现实结合的一些想法。

简介：回顾了GIS开源软件的发展现状，分析了当前业内对GIS开源软件的认识误区，指出了GIS开源软件的优势以及引进和利用的可能性和必要性，并针对国内GIS应用的现状介绍了一个基于GIS开源软件的地理信息服务架构，以期推动GIS开源软件在国内的进展。

简介：当错误当模特儿在GIS描述曲线的错误，曲线的一个随机的错误过程被建议。以随机的进程，有关曲线的本地错误的四个特征也就是，意味着错误的错误功能，标准错误函数，绝对误差函数，和相关函数，被提出。一条曲线的全部的错误被随机的错误过程的吝啬的方形的积分表示。概率的意思和上面提及的特征的几何意思也被讨论。一个scandigitization实验被设计检查模型的效率。在实验，一条等高线被数字化因为超过100次和大量样品功能从实验被导出。最后，所有错误特征根据样品功能被估计。实验结果证明在数字化的地图数据的系统的错误不是可以忽略的，并且曲线上的点的错误主要依赖于弯曲和曲线的凹度。

简介：ThispaperfirstbrieflylooksbackonthehistoryofcensusGISaroundtheworld,andthensummarizessomepreponderancesofdevelopingurbancensusGISinChina.Andthenathree-tierconstructionarchitecturefortheurbancensusGISisproposed.Finally,usingtheillustrationofthecensusdataofGuangzhoucity,thepaperanalyzesandelaboratessomeissuesontheurbancensusGISdesigning,suchasdatamanagement,datawarehousebuilding,anddataanalysis.

简介：一、前言城市综合功能地理信息系统（GeneralFunctionUrbanGIS）是在城市地理信息系统UGIS的基础上提出来的。提出这一命题的背景主要是：城市发展迅速，国际化的城市越来越多，工业化进程非常快，并迅速向国际化城市发展。这种城市国际化、城市工业化导致了社会信息化空前迅速地到来，城市中的信息流剧增，城市管理的信息量大幅度增加，规划与管理城市的方法也随之发生根本性的变化。而这种现代社会高度城市化的管理，

简介：ThecurrentGIScanonlydealwith2-Dor2.5-Dinformationontheearthsurface.Anew3-Ddatastructureanddatamodelneedtobedesignedforthe3-DGIS.Thispaperanalyzesdiverse3-Dspatialphenomenafromminetogeologyandtheircomplicatedrelations,andproposesseveralnewkindsofspatialobjectsincludingcross-section,columnbodyanddigitalsurfacemodeltorepresentsomespecialspatialphenomenaliketunnelsandirregularsurfacesofanorebody.Anintegrateddatastructureincludingvector,rasterandobject-orienteddatamodelsisusedtorepresentvarious3-Dspatialobjectsandtheirrelations.Theintegrateddatastructureandobject-orienteddatamodelcanbeusedasbasestodesignandrealizea3-Dgeographicinformationsystem.

简介：ManyInternet-GIShavebeenimplementedonthewebandtheyareincreasinglybecominganimportantpartofmultimediacartographythathasmuchmoreusersascomparedtotraditionalGISproductionmedia.InternetGIStechnologyhasprovidedtheGISdynamicinformationacquisitionwithtechnicalsupport.Also,thevisualizationtechnologyofelectronicmaphasprovidedtoolsforGISsymbolswithdynamiccharacteristics.OnthebasisofGISdynamicinformationacquisition,thedesignideaandimplementationmethodsofdynamicsymbolsindynamicGISarepresentedinthisarticle.

简介：Adoptingaprincipleof“check-acceptforthefirstrank,inspectionforthesecondrank”,thispaperbrieflydiscussestherationaleofthesamplinginspectionandthesamplinginspectionschemestodigitalproductsinGIS.TheOCcurveisdrawntoexplainthedeficiencyofthepercentsamplinginspection.Meanwhile,themethodofOneTimeLimitingQualityofcountselectionispresentedastheinspectionschemeforproductiondepartmentswhilethemethodofOneTimeAfter-inspectionMeanPercentDefectiveUpperLimitofcountselectionisforacceptancedepartments.

简介：本文提出ＧＩＳ中有关自动综合取舍问题的系统的研究。通过讨论地理基础数据库和其图形的概念以及与地图的区别，首先解释问题的目的和范围。在分析了复杂的地图综合取舍之后，介绍了较简单和更明白的综合取舍概念。根据这个概念，辩别和分类数据库处理和图形生成相关的综合取舍问题。由命题的方式提出关于数据库中综合取舍问题的分析，对于复杂问题介绍处理矩阵和处理网络来模拟基本处理。最后，本文阐述图形相关的综合取舍的一般原则

简介：Ithasbeendebatedthatwhichofrasterandvectoristhemosteffective,fromtheviewpointsofstorageefficiency,processingefficiency,andabilitytocapturetheessenceofgeographicspaceforanapplication.Theremaybenoclearanswertothisdebate.Itseemsappropriatetonotethatthemaindifferencebetweenthemrelatestothedegreetowhichthespatialentitiesofinterestareexplicitinthedata.　Ingeneral,rasterremotesensingimageallowstheinvestigatortomeasureandmonitorsurfaceelectromagneticwavevariationinwhichmostobjectsandthespatialinterrelationshipsbetweenthemareimplicit.Inpractice,therearemanypoorlyunderstoodtradeoffsincouplingremotesensingdatatoexistingthematicmaps.Mapsusepointsandlinestorepresentselectedfeaturesoftheenvironmentinageneralizedfashion,buttheobjectssuchasindividualpolygons,linesandpointswithinanimagearetypicallyunknown.　　TheintegrationofremotesensinginformationintoaGISoccursnaturallyinarasterGISbecausebothdatastructuresareapproximatelythesame.Integrationintoavectorsystemrequiressomewhatmoreeffort,butithasbeenrecentlyachievedbyseveralGISandremotesensingvendors.Whenoneisstoringalargeamountofimagedatarelatedtosomeapplicationsintoaspatialdatabasesystem,itisnotpossibletoprocessthedataandtoobtainpolygonalrepresentationsofallobjectsthatwillbeofinteresttousersinadvance.Ontheotherhand,itmightbeofgreatvalueinsuchasystemtohaveavectorrepresentationofcertainimportantobjects.Forthisapplication,oneneedstodesignasystemwithbothrasterandvectorcapabilities,aswellastoolstointerrelatethem.Especially,asinFig.1,weneedtoprocessbothrasterandvectorsimultaneously.　　Asdescribedabove,whileaspatialinformationsystemmayhaveseveraldatastructures,thesystemcouldbeextendedinseveralwayswhichcorrespondtothefollowingdifferentproperties(seeFig.2):　1)Thestuructureinforma

简介：网络分析作为GIS的重要功能，在电子导航、交通旅游、城市规划以及电力、通讯等各种管网、管线的布局设计中发挥了重要的作用。随着GIS系统集成应用的不断深入，为了满足用户的应用需求，我们通过二次开发的手段，为一些GIS平台定制了网络分析功能。利用经典的Dijkstra算法，结合GIS数据和平台特点，通过简单的程序设计可以实现复杂的网络分析功能。

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