Research on Key Technologies of Geospatial Information Services Application Based on Grid

摘要

The characteristics of diversity, dynamic, heterogeneity, massive data volume and distribution of geospatial information under internet environment are challenging the traditional geospatial information services. The appearance and development of grid computing provide a reliable environment for the sharing and effective utilization of geospatial information resources. Grid technology is imported into the domain of geospatial information services, this paper studies the geospatial information service system structure based on grid and the key technologies of grid applied in the field of map services, geospatial information search and collaborative service. Main research results are as follows: 1) The design and implementation of grid map service based on GT3.0 are introduced. The architecture of multi grid map services system if put forward. The capability of map service tackling high volume and concurrent access if enhanced by applying multi grid map services system with the policy of Weighted Round-Robin Scheduling. 2) The design of geospatial information search engine based on grid is put forward, the way to build geospatial information parallel and hidden-search platform by grid technology is discussed, and its implementation is also achieved. The efficiency of geospatial information search is promoted by applying geospatial information parallel search technology based on grid. 3) Grid technology is imported into the research of geospatial information collaborative services, the corresponding platform framework design is put forward. The prototype of distributed real-time collaborative mapping system is designed and implemented.