随着地理空间信息应用的不断增加，完成一个复杂的任务需要多学科多部门的参加与合作，因此有必要将提出了5个层次的互操作模型。地理信息的互操作是集成和融合的基础。互操作可以在不同层次上实施。该文提出了5个层次的互操作模型。

Increasing application of Geospatial information requires integration, fusion and interoperability of current monolithic GIS, especially of more complex and multidisciplinary application. Interoperability is the base for information integration and fusion. A five level GIS interoperability model is given. The spatial information infrastructure (SII) provides a sharing spatial information framework, architecture and an interoperability platform for geographical information system. This paper studies architecture of spatial information infrastructure, and gives the relationship between GIS interoperability model and spatial information infrastructure architecture. We consider GIS interoperability model provides theory base for SII, and SII provides an implementation platform for GIS interoperability model.