基于SVG的WEBGIS地图展示系统的研究与实现

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1、西南交通大学硕士学位论文基于SVG的WebGIS地图展示系统的研究与实现姓名：杜琳申请学位级别：硕士专业：计算机应用技术指导教师：楼新远20090301西南交通大学硕士研究生学位论文第lI页AbstractInthetraditionalGIS，dataisverylarge，thereareavarietyofdataformats，andcomplexstructures．Butnetworkapplicationsrequireslightweightinformationtechnology，therefore，thedispl

2、aysystemofmapbasedontheSVGformathasbecomearesearchdirectionofcurrentWebGIS．ThispaperfirstintroducesthedevelopmentofcurrentWebGISandthecharacteristicsofdevelopmentplatform，andpresentstheSVGtechnologyanditsapplicationontheIntemet．Itdescribesthedivisionofsystemmodulesandrel

3、atedfunctions．Itanalyseslinksbetweenmodules．Thesystemisdividedintotwoparts，foregroundandbackground，theforegrounddisplaysthemapontheInternet，thebackgroundmainlymanagesmap．Secondly，thisarticlemakessecondarydevelopmentofMapObjectsinVB6．0，throughSVGMapper，theextensionfunctio

4、nofArcView，themapfilesareconvertedfromtheshapeformattotheSVGformat．Itimplementstheaccessandmanagementofmapdata，andthemapinSVGformatisdisplayedinthedynamicwebpage．Finally，itdescribestheapplicationofAjaxinWebGIS．TheASP．NETdevelopmentframework，embeddedwithAjax，isused．Throug

5、hJavascriptcallingSVGDOMinterfaces，thedisplayofmapinSVGformatiscontrolled，itembodiestheoperationfunctionsofmapinclientofWebGIS．BasedonthetechnologyofWebService，adisplaysystemofmapinWebGISisgraduallysetup．Comparedtothegridmap，thisarticleusesthemapinSVGformatbasedonXML，who

6、sedatasizeissmallerinthetransmissionofnetwork．Themapdataofdifferentregions，accumulatedoveralongperiod，isselectivelydisplayedinthenetworktomanyusers，thesystemapplicationofWebGISisimplemented．西南交通大学硕士研究生学位论文第1lI页WithpartoftheresourceofmapaboutNingboinZhejiangProvince，itimp

7、lementsanapproachtoconvertmapfromtheshapeformattotheSVGformat．ThemapinSVGformatisusedinWebGIS．Itimplementsthebaseoperationsonthemapinthewebpage，andprovidesasimplequeryfunctionofbustransferschemes．Thefeasibilityandeffectivenessofthesystemalevalidatedbyexperiment．Keywords：

8、WebGIS；SVG；Ajax；Map西南交通大学学位论文版权使用授权书本学位论文作者完全了解学校有关保留、使用学位论文的规定，同意学校保留并向国家有关部门或机构送交论文的复印件和电子版，允许论文被查阅和借