面向对象数据模型构建GIS一体化数据库的应用研究

由于GIS是集图形、图像、属性等多种数据源于一身的空间信息管理系统,因此当前该领域研究热点之一就是如何构建一体化的数据管理机制。本文首先分析了现有GIS空间数据库管理机制的不足,然后介绍了目前数据库领域中一种新型的数据模型--面向对象数据模型,分析了采用面向对象数据模型建立GIS空间数据库的现实意义和优势,对开发基于面向对象数据模型(OODM)的GIS一体化数据库技术路线进行了初步研究,并对有关实现方法进行了比较,最后展望了面向对象数据模型在GIS中应用的两个拓展领域。

The Fundmental Study on Application and Practice ofFounding Integrated Database of GIS withObject-Oriented Database Technology

GIS is a kind of spatial information management system with many kinds of data resource, such as graphics, image, attribute, etc. One of the current research foci in this field is how to establish an integrated database. In this paper, the limits of current mechanism of managing spatial database are analysed, and a new integrated spatial data model-object-oriented database model (OODM) is proposed. In light of the analysis of the actual meaning and advantages of this model, the technological trajectory and the practical method based on it are put forward. Then some actualizing methods are compared. At last two expectations of the application of object-oriented database technology in GIS are preferred.