摘要
针对车辆监控GIS系统中车辆对象轨迹数据变化频率较高、数据量大的特点,首先分析了当前常用的几种数据存储方法,然后在时空立方体模型基础上,提出通过切分时空立方体,形成单元时空立方体,并建立轨迹版本的建模思想。对模型的实现和基于此模型的时空查询算法进行了详细阐述。验证表明该模型能满足实际应用的需要,在减少存储和时空查询性能上有较大提高。
According to the special features -changed frequently and a large amount of datum-trajectory data in the vehicle monitor system, some methods of trajectory data storage were analyzed. Then a new data model based on space-time cube and manage data by trajectoryversion was built up. It was also described how to build this model and do some spatial-temporal query. Experiences show that this model satisfy the requirements of application. The storage is reduced and the performance of spatial-temporal query is improved.
出处
《计算机工程与设计》
CSCD
北大核心
2006年第6期1042-1044,1051,共4页
Computer Engineering and Design
关键词
车辆监控
时空立方体
轨迹版本
空间索引
时空查询
vehicle monitor
space-time cube
trajectory-version
spatial index
spatial-temporal query
