【作者】 丁峰；

【导师】 邵定宏；

【作者基本信息】 南京工业大学 ， 计算机应用技术， 2005， 硕士

【摘要】 地理信息系统(Geographic Information System)是一种能够采集、贮存、管理、分析和描述整个或部分地球表面与空间地理分布有关数据的空间信息系统。近年来,GIS 在矿产资源管理、电力、城市规划等领域得到了广泛的应用,对国民经济生产和决策起着重大作用。随着人们对地理信息需求的增加,基于Internet 发布地理信息数据,供全球用户查询、检索并提供GIS 服务的Web GIS,已成为地理信息系统发展的重要方向之一,因此论文选择Web GIS 作为研究课题。本文针对目前Web GIS 存在的信息共享困难、可扩展性差、难于和其他信息管理系统集成等不足,从异构的空间数据模型入手,采用OGC 制订的空间数据模型,以当前互联网发展的主流技术——Web Service 为系统的技术核心来实践一个基于Web 的跨越不同系统的地理信息服务平台。全文共分六章。第一章为绪论,介绍了Web GIS 的基本概念和特点、国内外的研究现状,以及Web GIS 的发展趋势。第二章叙述了目前Web GIS 系统的结构和Web GIS 系统开发技术,并对各种技术的实现方式和特点进行了详细的比较。第三章研究基于Web Service 的Web GIS 原理、相关概念、系统模型、体系结构和工作流程,对构建系统的关键技术作了说明,并总结了Web GIS Service的特点和相对于传统Web GIS 的改进之处。第四章研究由OGC 开发的地理标记语言GML 的模型、框架和对地理信息的表达;针对光栅图形在Web GIS 系统中的缺陷,引入一种基于文本的矢量图形SVG 来解决地图的传输与交互问题。第五章探讨了基于Web Service 的Web 地图服务原型系统的初步实践,包括基于GML 的数据库存储与设计、基于Web Service 的地图服务接口设计和基于SVG的客户端相关功能设计。第六章对本文的内容做了一个总结,并对未来的工作进行了展望。更多还原

【Abstract】 GIS(Geographic Information System) can gather, store, manage, analyse and describe geographic information related to part or whole of the earth surface. In recent years, it is widely used in the fields of mineral resource management, electric power system, urban planning etc. GIS is important to the production and decision of our country. With the increase of demand to geographic information, Web GIS becomes one of the important directions in the researches of GIS. Web GIS can release geographic information data by Internet, it supports global users queries and provides GIS service. Therefore this paper chooses Web GIS as research subject. In order to solve the shortages exist in traditional Web GIS such as information sharing difficulty, bad expansibility, difficult to be integrated by other information systems, this paper begins from different spatial data model, adopt the spatial data model established by OGC and Web Service as the technical core of the system to realize a platform of geographic information service based on different operation systems. This paper consists of 6 chapters. Chapter one is the introduction, introduces the basic conceptions, characteristics, current internal and international research situation, development trends of Web GIS. The second chapter describes current structure of Web GIS and Web GIS development technology, and does detailed comparison to various kinds of ways and characteristics of realizing technology. Chapter three studies the principles, related concepts, system model, architecture and working process of the Web GIS based on of Web Service, describes key technology used to establish the system, summarizes the characteristics of Web GIS Service and improvement compared with traditional Web GIS. Chapter four studies the model, framework, and expression to geographic information of the GML(Geography Markup Language) developed by OGC, considering the defect of the raster graphic in Web GIS, introduces a kind of vector graphics SVG to solve the transmission and mutual problem. Chapter five discusses preliminary practice of the Web map serving prototype system based on Web Service, including storage and design of the database based on GML, design of the map service interfaces based on Web Service, design of the relevant functions of client browser based on SVG. In the last chapter, general review and some improved suggestions are given for the dissertation.更多还原