Aiming at the demand of data sharing, resource management and spatial analysis of distributed geographic information, put forward a new method of integration framework based on EDIF improve on frame, through combining the characteristics of grid computing, studies on the key technology of distributed multi-resource heterogeneous geographic information based on grid computing. By taking advantage of the extension mechanism of OGSA-DAI, a new approach to topological analysis and special interoperation is presented. JDBC Driver for OGSA-DAI is used to implement the access to the data resource. Finally a distributed heterogeneous GIS integration and interoperation prototype is implemented. The prototype is able to provide a uniform service-based interface for users, and is validated by experiments.