基于HTML5和GIService的WebGIS系统开发

发布时间：2019-04-04 18:49

【摘要】：地理信息系统（Geographic Information System，GIS）作为一门多学科和多技术交叉的边缘学科，它的发展得益于各学科和技术的综合发展。随着计算机技术、地球科学技术和网络信息技术的快速发展，GIS已从之前的单机模式逐步发展为现在的网络GIS，并进一步朝着网格GIS、云GIS的方向发展。Web服务的出现为地理信息的共享和互操作提供了技术支持途径，数据共享和GIS系统功能互操作的需求使GIS的网络化趋势成为必然。而WebGIS作为网络GIS的一种，从一出现就极大地促进了GIS的发展。本文分析了现有WebGIS系统的不足，，在此基础上探讨了HTML5、Web服务在WebGIS中的应用，探讨和研究了一种基于HTML5和GIService的轻量级、开放式WebGIS系统模型，并初步实现了原型系统，在此基础上开发了土地利用信息WebGIS系统，对论文中提出的系统模型进行了验证。具体内容包括：（1）在对HTML5、GIService和Ajax技术进行分析的基础上，结合各自的优点，构建了基于HTML5和GIService的轻量级、开放式WebGIS系统模型，阐述了其设计思想，初步实现了原型系统，探讨了开源软件下服务器端的实现；（2）研究和探讨了基于HTML5的原型系统客户端研究与实现。主要探讨了基于HTML5canvas的客户端矢量地图绘制和渲染，根据点、线、面状符号的数据结构，基于HTML5canvas，设计并实现了点、线、面状符号的绘制和渲染，并存储在二维符号库中以供用户调用；初步探讨了基于HTML5Web Database机制的客户端空间数据存储；（3）构建了一个土地利用信息WebGIS系统，详细阐述了其构建背景和过程，并对其相关功能进行了编程实现，对本文提出的系统模型进行了验证。实践证明，本论文构建的WebGIS系统模型，其浏览器客户端在不依赖第三方插件的条件下实现了矢量地图的可视化和操作，丰富了浏览器端的应用；具有典型的开放能力，达到了数据与功能的分布式布局及共享与互操作；且系统小巧、轻便、简单易于开发。总的来说，具有一定的理论和实际研究价值。
[Abstract]:Geographic Information system (Geographic Information System,GIS) as a multi-discipline and multi-technology cross-cutting discipline, its development benefits from the comprehensive development of various disciplines and technologies. With the rapid development of computer technology, geoscience technology and network information technology, GIS has gradually developed from single machine mode to current network GIS, and to grid GIS,. The emergence of web services provides technical support for the sharing and interoperation of geographic information. The requirement of data sharing and interoperability of GIS system makes the trend of GIS networking inevitable. The emergence of web services provides technical support for the sharing and interoperability of geographic information. As a kind of network GIS, WebGIS has greatly promoted the development of GIS. This paper analyzes the shortcomings of the existing WebGIS system, discusses the application of HTML5,Web services in WebGIS, discusses and studies a lightweight and open WebGIS system model based on HTML5 and GIService, and preliminarily implements the prototype system. On this basis, the land use information WebGIS system is developed, and the system model proposed in this paper is verified. The main contents are as follows: (1) based on the analysis of HTML5,GIService and Ajax technology and their respective advantages, a lightweight and open WebGIS system model based on HTML5 and GIService is constructed, and its design idea is expounded. The prototype system is preliminarily implemented, and the realization of server side under open source software is discussed. (2) the research and implementation of prototype system client based on HTML5 is studied and discussed. This paper mainly discusses the drawing and rendering of client-side vector map based on HTML5canvas. According to the data structure of point, line and plane symbol, the drawing and rendering of point, line and surface symbol are designed and realized based on HTML5canvas,. And stored in the two-dimensional symbol library for users to call; The storage of client-side spatial data based on HTML5Web Database mechanism is discussed. (3) A land use information WebGIS system is constructed, its construction background and process are described in detail, and its related functions are programmed and realized, and the system model proposed in this paper is verified. The practice proves that the WebGIS system model constructed in this paper realizes the visualization and operation of the vector map without relying on the third party plug-in and enriches the application of the browser side. It has the typical open ability, achieves the data and function distributed layout and the sharing and the interoperation, and the system is small, portable, simple and easy to develop. In general, it has certain theoretical and practical research value.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：P208

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