面向GIS数据共享的概念模型设计研究

Ｇ Ｉ Ｓ 数据共享的主要问题是数据的语义共享。在数据共享的保障基础———技术基础、标准化体系及政策法规体系中，标准化工作最为直接，而其中面向数据共享的概念模型的设计又是最基础性的工作之一。面向数据共享的概念模型设计的主要任务是寻求一种规范化、标准化的约束法则来保障数据的共享，为了保障数据共享的安全性，所设计的概念模型应能提供用于共享的抽象概念，这些抽象概念所描述的是地理概念而非纯空间概念，并应能提供语义抽象机制。采用语义数据模型的方法，提出利用地理特征这一概念作为建模的基本概念。通过一个实例对其应用进行了初步探讨。

Study of GIS Conceptual Model Design for GIS Data Sharing

The main challenge in GIS data sharing is semantics sharing of the data. Of the main basis for data sharing including technological development, data standardization and legal basis, the standardization is the most direct one. The design of one standard conceptual data model, which is a data sharing related fundamental task, is the most important strategy to make a precise semantics sharing. The authors' perception of standard conceptual model design is intended to find a suitable, systematic set of rules to ensure the safety of data sharing. The model designed must provide abstract concepts that can be interfaced for data sharing and therefore the concepts must be geographic concepts instead of spatial concepts. The abstract mechanism must also be designed in the process of modeling. The GIS semantic data modeling approach has been used as a tool to design the needed conceptual model. As a basic geographic concept, geographic feature has been used as a semantic object.