面向对象的地理实体时空位置多粒度表达

发布时间：2018-03-31 16:27

本文选题：时空位置　切入点：地理实体　出处：《地球信息科学学报》2017年09期

【摘要】：同一地理实体在不同的时空粒度下会表现出相异的位置动态变化规律。近年来,如何对地理实体在不同时空粒度下的时空位置进行组织和表达成为GIS研究的热点之一。本文基于面向对象的思想,设计了"三级空间"和"0-1位置变化序列",并由此提出一种地理实体时空位置的多粒度表达方法。在实体时空位置的多粒度描述方面,对于任一地理实体,空间维度上构建一种具有不同空间粒度的"全局—相对—对象"三级空间;时间维度上将不同时段或时刻转换为一系列不同时间粒度的离散时间点。在实体时空位置的多粒度存储组织方面,将地理实体时空位置的变化过程划分为不同阶段,对该实体在不同时间点下的空间位置信息设置不同的存储方式,可合理减少信息冗余。在实体时空位置的多粒度转换方面,提出基于三级空间的递进认知、时间点与时段之间快速转换等策略,初步实现了地理实体时空位置在不同时空粒度下的转换。该方法可有效地描述地理实体在可变时空粒度下的时空位置,为时态GIS和多粒度时空数据库的建立提供参考。
[Abstract]:In recent years, the same geographic entity will show different dynamic changes of position under different space-time granularity. How to organize and express the spatial and temporal positions of geographic entities under different spatio-temporal granularity has become one of the hotspots in GIS research. In this paper, "tertiary space" and "0-1 position change sequence" are designed, and a multi-granularity representation method of spatio-temporal location of geographic entity is proposed. On the spatial dimension, a three-level space with different spatial granularity "global-relative-object" is constructed. In time dimension, different time periods or times are transformed into a series of discrete time points with different time granularity. In the aspect of multi-granularity storage organization of entities' space-time positions, the changing process of geographical entities' space-time positions is divided into different stages. Setting different storage methods of spatial location information at different time points can reasonably reduce information redundancy. In the aspect of multi-granularity transformation of entity's space-time position, progressive cognition based on three-level space is proposed. Based on the strategies of fast transition between time points and time periods, the spatial and temporal positions of geographic entities under different spatio-temporal granularity are preliminarily realized. This method can effectively describe the spatio-temporal positions of geographic entities under variable spatio-temporal granularity. It provides a reference for the establishment of temporal GIS and multi-granularity spatiotemporal database.
【作者单位】：武汉大学测绘遥感信息工程国家重点实验室;武汉大学地球空间信息技术协同创新中心;
【基金】：国家重点研发计划项目“全空间信息系统与智能设施管理”(2016YFB0502300) 国家自然科学基金项目“基于群体用户密集访问模式的网络地理信息并发服务方法研究”(41371370) 测绘遥感信息工程国家重点实验室专项科研经费资助
【分类号】：P208

【相似文献】