多源空间数据库查询技术

Research on Spatial Database Query Technology for Multiple Data Source

为了实现多数据源空间数据集成,提出一种多源空间数据库查询系统框架.基于多数据源的空间对象关系模型,针对多数据源空间数据查询的需求,面向采用空间数据和属性数据分别管理的数据源,提出了支持查询分解和查询结果筛选的数据查询算法,分析说明了适用于空间数据查询的优化方法,形成了一套支持多数据源空间数据库查询技术.

To achieve spatial data integration from multiple data sources, a query system framework of multiple spatial database is proposed and its working principle is introduced. According to the spatial object relation model based on multiple data sources, to meet the requirement for the spatial database query, a data query algorithm including query decomposition and filtering is proposed for the data source in which spatial data and non-spatial data are managed separately, and several methods for query optimization in spatial data query are analyzed. A spatial database query technology for multiple data source is developed.