网格地理信息数据库研究和应用仿真

Research on Grid Geographical Information Database and Its Application Simulation

地理信息系统随着空间数据的不断丰富,各种属性数据的不断加入,数据量呈几何级增长,另外政府和企业各部门之间的地理信息数据相互独立,有很高的自治性,因此地理信息数据管理和数据整合越来越困难。采用基于网格计算的地理信息数据库构建方法,很好地解决了这个问题。这种构建方法整体结构采用网格技术,在网格节点使用分布式数据库,在数据组织上采用多维度,多层次数据组织形式对数据进行分块存储,建立索引网络。很好地解决了数据访问效率、数据扩充和快速整合问题。在试验中证明,这种地理信息数据库构建方法是一种高效的地理信息数据管理和服务提供模式。

Because the space data become abundant and all kinds of property data are involved, the data quantity increases in geometric way. In addition, geographical information data between governments and departments of enterprises are independent from each other and they are with high degree of autonomy. Therefor, it becomes more and more difficult to manage and integrate these geographical information data. By adopting geographical information database construction method, which is based on fast search, this problem is solved very well. For this construction method, grid technology is applied on its monolithic structure, distributed database is employed on its grid node, multi - dimensional and multi - tiered organization form is used on its data organization. It stores the data into different blocks to set up index network. Problems like data access efficiency, data expansion and fast integration are sovled perfectly. Tests have proved that the construction method of geographical information database is a high - efficient mode to manage geographical information data and to supply service.