受限网络中的时空索引是解决此类时空数据管理问题的关键所在。
The spatiotemporal index for the constraint network is one of the key issues in this field.
利用时空索引结构的特点，应用距离度量来减小平均磁盘访问量是查询处理常用的方法。
Making use of the structure of st indices, and applying distance metrics to decrease average disk access count is the most popular method in st query processing.
通过合理的资源调配、高效时空索引和动态缓存机制来提高空间变化过程动态可视化的效率。
Additionally, visual efficiency of dynamic spatial variation has been improved by reasonable resource arrangement, high effective spatial-temporal query and dynamic cache mechanism.
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