【作者】 熊卫东；

【导师】 罗年学； 韩琼；

【作者基本信息】 武汉大学 ， 大地测量学与测量工程， 2003， 硕士

【摘要】 GIS作为对地理信息系统进行快速获取、管理、操作和显示的有效工具,其应用领域日益扩大。而传统的GIS软件在很大程度上既不能满足GIS应用的需求,也不符合现代软件技术的要求,因而迫切需要一种新的GIS开发技术来解决上述问题,组件式GIS(ComGIS)应运而生,它是基于组件开发技术的新一代GIS,是解决传统GIS所面临问题的全新技术体系。 地图符号制作系统是GIS中不可缺少的基础功能模块之一,传统的GIS软件中的地图符号制作系统在通用性、方便性、灵活性等方面存在一些不足,需要采用组件技术开发一个通用的地图符号制作工具,以满足组件GIS开发的需要。 本文首先介绍了组件技术的原理、特点以及组件GIS的优点,提出了基于COM技术的通用性的地图符号制作系统的构架。本文将整个系统划分成两个部分:地图符号绘制组件和地图符号制作组件,并介绍了各个组件接口和组件对象。在系统中引入了外部程序符号接口,用于对外部程序符号进行管理,提高了系统的开放性。最后,介绍了本符号系统在RdGIS中应情况,并研究了本符号系统与MapObiects集成的策略,实现了三个MapObiects的自定义的符号组件对象,扩充了MapObjects的符号功能。 实验结果表明该组件设计合理,符号系统具有较好的开放性。更多还原

【Abstract】 As an effective tool to obtain, manage, operate and display geographic information, GIS is applied more and more widely day after day. Neither can traditional GIS software meet the demands of the application, nor conform to the mainstream of software technology in deep extent. These problems listed above must be solved by a new software technology implemented to develop GIS, Components GIS, briefly called ComGIS, is a new generation of GIS based on Components Software and Component-Based Development technologies, which meets with the requirement of providing new idea to solve the problems the traditional GIS faces completely.The system of map symbol making is one of the indispensable basal functions in GIS. In Traditional GIS software, there is devoid of the function making the system of map symbol. So it is necessary to build a common system of making map symbol based on component technology.This paper introduces the principles and features of component technology, the advantage of component GIS, and designs the component framework, component interfaces and component classes based on the COM technology. In the system, the interface is designed to manage the outer programming symbol. Finally, the strategy that the symbol system integrated with MapObjects is put forward and three custom symbols of MapObjects are realized.The system test proves that the design of the map symbol system is reasonable and the map symbol system has good opening.更多还原