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:摘要地理信息系统(GIS)是用于存储、管理和显示空间要素位置和属性(如地理空间数据)的计算机系统。自20世纪70年代以来,GIS的重要性体现在自然资源管理领域。而GIS在模型建立方面起到了至关重要的作用,本文主要对GIS建模的基本元素进行介绍,并对GIS模型的分类、建模过程、GIS在建模中的作用、GIS与其他建模程序的组合进行了分析。为GIS模型与建模提供了基础研究资料。
简介:Inordertosetupaconceptualdatamodelthatreflectstherealworldasaccuratelyaspossible,thispaperfirstlyreviewsandanalyzesthedisadvantagesofpreviousconceptualdatamodelsusedbytraditionalGISinsimulatinggeographicspace,givesanewexplanationtogeographicspaceandanalyzesitsvariousessentialcharacteristics.Finally,thispaperproposesseveraldetailedkeypointsfordesigninganewtypeofGISdatamodelandgivesasimpleholisticGISdatamodel.
简介:ThedevelopmentofInternetprovidesconvenientenvironmentforinformationsearchingandbrowsing.Italsoofferssanewplatformforgeographicinformationprocessingandanalysis.ThispaperdiscussesorganizationandprocessingapproachtoInternetgeographicinformation,andprovidesanewmethodtocross-platformanddistributedgeographicinformationanditssoftwareimplementation.Theexampieisusedtoshowthepracticalityandsuperiorityofthismethod