An integrated framework for geospatial data discovering and standardized processing

摘要

This paper propose a solution to discover geospatial data from multiple distributed data center in the Web environment. There are two-level of data discovering defined in the paper: dataset discovery and data granule discovery. To find the dataset of interest, multiple dataset clearinghouses were integrated under a dataset catalog federation. Based on the returned dataset information, an integrated catalog was implemented to find data granule from remote data providers. OGC Catalog Service for Web specification was adopted as the interface of catalog federation. The mediator-wrapper architecture was proposed to solve the query language translation and metadata conversion. For the returned data granule, a standardized data processing service, Web Coverage Service was designed and implemented to process heterogeneous data through a universal interface. Overall, the proposed solution in this paper was demonstrated to be effective to find dataset and data granule of interest from multiple sources, and process acquired heterogamous data through standardized interface.