嵌入式GIS平台提升矢量地图操作速度的数据存储与管理技术的研究

矢量地图数据存储与管理技术是嵌入式G IS系统的重要研究内容,结合电子地图工作模式和地图数据访问特点,在常见的图幅分块和数据分级基础上,提出建立实体附加检索数据区和实体详细属性数据区;同时引入超块单元,并对超块内地图数据重新组织,从而使得人机交互时,数据定位时间缩短,数据读取冗余量减少,矢量地图操作性能表现更好。

Realization on vector map data storage and management to speed map operation on embedded GIS

The technology of vector map storage and management is a main research content on an embedded GIS.According to electrical map work mode and map data access specialty,based on sheet cutting block and data grading,this paper proposed a method to construct an entity searches area and an entity details attribute area.At the same time,it introduced a super block unit and reorganized map data.As a result,data position time and data redundancy can be reduced,which greatly improves vector map response speed.