Integration Of Spatial Information Service In Grid Environment

The research on present spatial information services is mainly based Web Service framework.According to OGC specification,some standardized spatial information services, such as WMS, WFS, WCS and so on are developed.On some levels they take effects on interoperability and sharing of spatial information, but in the massive distributed spatial data processing and to provide users with integrated and transparent service methods they encounter many difficult problems to overcome, while in computingability, interoperability, having many deficiencies.The emergence and development of grid provide a secure environment for efficient use and sharing of geospatial information resources. Grid technology takes hope to resolve problems esiting in spatial information services. Through sharing resources, collaborational and parallel computing capabilities, grid computing can be integrated to provide effective clustering and load balance, supporting for multi-user collaborative operations on spatial information resource to address the problems such as the lack of computing power, lack of coordination, and the shortcoming that it can't go back in operation because of lack of service states.This research starts from grid technology and further does work about the sharing of spatial information services under grid environment, the main work i did as follows:1. Using xml and java technology to retrieve the OGC web services information and analyze them, accessing to service metadata and services' specific methods, which will be stored in the database for persistence.2. In the analysis of grid technology and based on the WSRF specification,i provide a concept of WSRF-enabled spatial information services resource encapsulation method.The OGC services is transformed into the form that services and resources are seperated using a grid service packaging system.3. Do some work in the implementation of grid service workflow, try to address service interoperability between services.4. Development and design of a grid spatial information service sharing platform-Lgrid including some modules such as creating of grid service parsing of web service,monitor of grid nodes.