面向对象的GIS虚拟环境实现研究

STUDY ON IMPLEMENTATION OF OBJECTORIENTED GIS VIRTUAL ENVIRONMENT

地理信息系统(G IS)从外部来看,它表现为计算机软硬件系统;而其内涵是由计算机程序和地理数据组织而成的地理空间信息模型,是虚拟环境的一种实现形式。提出采用面向对象技术实现一个G IS系统,具体介绍了设计的虚拟地理信息系统数据模型,在该数据模型中引入地理元素对象和操作,用对象容器来实现对地理元素和操作的支持和管理。最后给出了一个利用面向对象开发工具JAVA实现G IS系统的实例。

Geographic information system（GIS） is known as a computer system. The connotation of GIS is geographic information models built by computer program and geographic data. It＇s a kind of implementation of virtual environment. This paper introduces an implementation of GIS by use of object-oriented technology. The geographic object, operation and the object container of this virtual GIS model are discussed in detail in this paper. An example of GIS based on JAVA is also presented.