面向数字城市的空间应用服务互操作模型研究

Research on the MDA-based GIS Interoperability

该文从模型驱动的角度研究空间信息共享与GIS应用服务的互操作。首先分析数字城市服务系统的体系结构及GIS领域在互操作方面存在的困难,对OMG的模型驱动架构作了较详细的研究。认为对于数字城市中多领域众多应用系统互操作的情况,需要从一开始就结合目前相关的地理信息标准和规范,按照MDA的架构和原则设计一系列系统共同遵循的模型。并探索了如何按照这种思想为不同的GIS应用系统设计和建立公共模型、方法、工具和系统框架。以一个应用实例介绍如何在实践中应用这种思想和方法。

This paper describes the research on the spatial information sharing and the GIS's interoperability from an MDA-point of view. First the authors analyse the GIS interoperability difficulties, and then argue that a common model is needed for the cooperative GIS applications to follow from the design. Based on the careful analysis of MDA,a conclusion that MDA will help to promote the GIS interoperability is given. Next the authors discuss how to establish and provide the common-models, methods, tools and frameworks for different GIS applications and present some principles and general procedures. Finally a case study, a sub-project of the national project 'Digital Beijing', is introduced to demonstrate and validate the usability and viability of this proposed concept.