摘要
动态分段技术是交通地理信息系统(GIS-T)中一项重要的线性要素动态显示与分析技术,该文提出了一种时空动态分段模型,使动态分段系统的组成成分融入时态因素,并将属性的时态信息作为属性信息表的字段存储,通过时态地理信息系统技术完成物理段的时态变化。利用统一建模语言(UML)的类图设计方式开发了物理模型,描述了时空动态分段模型中对象之间的关系,并定义了必要的属性和操作;同时基于线性参照系统(LRS)表达空间实体的方法,概括了模型中所涉及到的主要拓扑关系。实验表明,时空动态分段模型弥补其他模型将时空参考分为时间参考和空间参考所产生的不足,而且更明确地将多重属性和物理实体有机结合起来。
Dynamic segmentation is an important technique in the dynamic analysis, displaying ol linear features in Geographic Information System for transportation. In this paper, a spatio - temporal dynamic segmentation model has been put forward. Dynamic segmentation system will be merged into temporal factor, and the temporal informa-tion in the attribute tables as afield will be restored, and the temporal maintenance ol physical arcs by temporal GIS techniques will be reconciled. In the logic model, the relationships between objects in spatio temporal dynam-ic segmentation model are provided and the necessary attribute fields and operations are defined according to the class diagram in Unified Modeling Language . The topologic relations related to the spatio temporal dynamic seg-mentation model are also introduced based on the on - dimension expression of the linear reference system. Experi-mental results show that the spatio temporal dynamic segmentation model make up the other models defects of di-vided spatio temporal segmentation mode into time reference and space reference, and combine the multiple attrib-utes with physical entities.
出处
《山东国土资源》
2017年第5期73-77,共5页
Shandong Land and Resources
关键词
时空动态分段
交通地理信息系统
统一建模语言
线性参照系统
拓扑关系
Spatio - temporal dynamic segmentation
traffic geographic information system
unified modeling lan-guage
linear reference system
topological relations
