Research On Spatial Data Storage And Management By DM3

The handle of spatial data is key issue of Geographic Information System (GIS). The spatial data can be analyzed and applied when stored and operated in GIS. So, it is important for GIS to store and manage spatial data. Due to limits by database technology, the traditional GIS can't be supported by Database. It is difficult for GIS data to be shared data and developed on the network. With the development of database technology, a large scale relation database (RDB), object-oriented database (OODB) and object-relation database (ORDB) get mature little by little on integrality, security, standardization, prevalence and so on. Most the databases can support non-structure data; so both spatial data and attribute data can be stored in database. When spatial data is stored and managed by DBMS, It can be indexed, queried and analyzed expediently. Finally, this paper introduces the status of arts of the spatial database (SDB) development. and presents SDB key technology such as spatial data modeling, query, optimizing and spatial data management technology. it is concluded that the development direction of SDB that Geo-data and attribute data be managed under SDBMS. Secondly, RDB, OODB and ORDB are studied. Three SDBMS performance be analyzed and compared, moreover their advantages and disadvantages are pointed out. Then, Depended on the practical technology, a new type resolve scheme is presented for database management system which was developed by Chinese (DM3). The author models a new type spatial data for DM3, and based on the model, enlarges DM3 action on spatial data management. Furthermore, the author studied spatial data storage model, spatial data displaying, query, optimizing and index of DM3, and develop the parts on spatial data storage and management under DM3.Finally, Shapefile which is a kind of format of file is taken an example for spatial data being stored and managed under DM3. The results show that DM3 performance is well to manage spatial data. So the author thinks DM3 will be perspective.