数据转换方法仅仅是从数据角度考虑互操作,是数据的集成,而没有考虑数据处理方面。实现GIS互操作意味着将具有不同数据结构和数据格式的系统集成在一起共同工作。对数据和处理资源的相互访问是互操作性的基本特征。GIS互操作强调语义及含义上的互操作,客户对数据和处理资源的访问是实时的,并且所获得的结果是可以预测的。该文在客户/服务器、面向对象思想,以及构件、驱动器(driver)技术的基础上,对OGDI进行改进,提出了GIS互操作的体系结构,并分析了实现互操作的几个重要环节——规程的制定、请求、应用函数集及驱动器在实现中应注意的问题。为了实现语义互操作,在规程中强调语义的正确表达和实现。

There are two ways to achieve Geo-information sharing:data transformation and GIS interoperability. Data transformation is an approach which mainly focuses on the data integration,but GIS interoperability implies that both data with different formats and data structures and processing resources related to the data can be sharable.Mutual access to data and processing resources are the basic characteristics of GIS interoperability. GIS interoperability stresses semantic interoperability. Based on client/server,object-oriented,component and driver technology,the architecture of GIS interoperability has been presented.There are many key aspects in this architecture:communication protocol, specification,requests and answers,API and driver.