摘要
针对目前导航电子地图生产中导航地图数据生产周期长的问题,提出了一种基于导航数据生命周期状态维护触发器的导航地图数据生产时空动态更新模型。首先基于时空数据库技术构建了导航地图数据生产时空数据模型,构建了导航数据生命周期状态维护触发器,将导航数据空间关系分为一级几何拓扑和二级逻辑拓扑。利用触发器,使得导航数据的任何变更(几何和逻辑)得到有效记录,保证了增量包的有效导出。
A temporal-spatial dynamic update model for navigation map data production based on life circle status maintaining trigger of navigation data was proposed,because of that the production circle of navigation digital map is too long nowadays.The temporal-spatial data model for navigation map data production was built based on temporal-spatial database technique.Then status maintaining trigger of navigation data life circle was built as well.The navigation data spatial relation was divided into two levels in dynamical updating process,there are level 1 geometric topological relation and level 2 logical relation.Any change of navigation data would be recorded by the trigger,so the validity of incremental package was guaranteed.
出处
《地理信息世界》
2011年第4期47-50,共4页
Geomatics World
基金
天津师范大学博士基金项目(52XB1008)资助
天津师范大学空间信息服务重点实验室基金项目(53H10070)资助
关键词
增量更新
时空数据模型
生命周期状态维护触发器
局部拓扑
incremental update
temporal-spatial data model
life circle status maintaining trigger
partial topology
