摘要
组件式地理信息系统(ComGIS)是指由一组遵循组件对象模型“工业标准”的、基于组件对象平台的、允许跨语言应用甚至跨计算机交互的组件提供的GIS,各GIS组件之间可通过标准的通信接口实现互操作,目前它已经成为地理信息系统软件发展的新潮流。VisualC++简称VC,是微软公司推出的一个面向对象的、功能丰富的可视化重量级的开发工具。在目前流行的VisualC,VisualBasic,Delphi等众多开发工具中,其功能最为强大。但目前对于在VC环境下如何开发组件式地理信息系统的研究却很少。本文以VC6.0开发环境和MapObjects2.0为例,采用西北干旱区典型的石羊河流域的数据,探讨了在VC环境中地理信息系统组件的嵌入、地理信息系统基本功能如图形的放大、漫游以及图形显示的恢复等基本问题,进而为开发基于VC环境的组件式地理信息系统提供参考和依据。
ComGIS,is components of geographic information systems,is composed of a group of GIS components which conform to the 'technical criterion' of COM(Component Object Model) and is based on the platform of component objects and can be applied to all programming languages,furthermore various computers.One GIS component can communicate with another through standard communication interfaces. At present, it is a mainstream in GIS technology. Visual C++, is VC for short. It is the heavy weight of programming language by Microsoft corporation with sufficient functions,being object oriented and visual.It is one of the most powerful popular programming languages at present, such as Visual C++, Visual Basic, Delphi, etc. But the research on the development of ComGIS is rarely carried out in VC++ programming language. The paper gives an example of the development of ComGIS in VC++. The map data is from the Shiyanghe river basin which is a typical inland river basin in northwestern China. The fundmental functions of GIS, such as built-in of GIS components, zoom, pan and refreshing of a map and so on have been discussed. The research in the paper gives scientific and referenced bases for the development of ComGIS based on VC++.
出处
《地球信息科学》
CSCD
2004年第1期41-43,共3页
Geo-information Science
基金
国家自然科学基金(70073045)
国家重点基础研究发展规划973项目(G19990346-06)
北京市自然科学基金项目(60032003)资助.
