移动数据库中支持车辆交通管理的时空模型

A spatio-temporal model for supporting traffic management in MOD

提出了一种用于有效管理交通,基于基本空间对象模型,紧密结合时间维的时空模型.针对当前大多数时空模型的局限性在于把复杂立体化的交通网络变成平面化的实体、导致网络分析效率不高的问题,以现有成熟的关系数据库为底层架构,采用自底向上的嵌套方式对移动对象(交通工具)和固定空间对象(交通网络、路标、区域等)进行建模,以及分层和栅格化处理交通网络的各个区域,有效地提高了时空查询和各种操作的效率.

Proposed is a spatio-temporal model based on basic spatial object model and linked time models closely for managing the traffic effectively. The limitation of most current models is converting the complex three-dimensional traffic network into the plane of entities, so the efficiency of analysis on the net work is not high. Regarding existing and ripe relation database as the framework, this pa- per adopted the bottom-up nested way and carry on modeling in moving the target（the means of trans- 9 pOrtation ） and regular space target （traffic network, signpost, area, etc. ）, and divide layers and bar format treatment each area of traffic network, effective improvement the efficiency of spatio-temporal inquiry and different operations.