航道通航时空数据组织与可视化表达研究

Research on spatio-temporal data organization and visualization of navigation in channel

为解决航道GIS数据资源之间的语义独立性和异构性,通过分析元数据的结构和管理机制,提出了一种基于XML的分布式空间数据组织存储方法。该方法根据航道实体要素地理位置分布的层次性与关联性,建立了统一空间参考的航道时空一体化数据存储模式,在此基础上,运用时空GIS多维建模、地形场景构建、离散观测数据插值等技术,实现空间和时间维度数据的可视化表达。以长江上游航段为例,基于该方法实现了多源异构数据的融合组织,采用三层技术架构开发了应用系统,成功应用于航道通航与辅助决策。应用结果表明,该研究可以有效地解决复杂航道环境下数据组织与可视化的难点,为船舶航行提供安全保障和支撑。

In order to solve the semantic independence and heterogeneity of GIS data resources in channel,the paper analyzed the structure and management mechanism of metadata and proposed a distributed spatial data organization storage method based on XML.According to the level and relevance of the geographical location distribution of the main elements of the channel,the method established a spatio-temporal integrated data storage model with spatial reference. On this foundation,the paper realized visualization of spatial and temporal data, which applied such as spatio-temporal GIS multi-dimensional modeling technology, terrain scene construction technology,discrete observation data interpolation technology,etc. Taking the upper reaches of the Yangtze River as an example,multi-source heterogeneous data fusion organization was realized and an application system was developed based on three-tier technical architecture,which was applied to ship navigation and auxiliary decision-making successfully. Application results show that the study can effectively solve the difficulties of data organization and visualization in complex waterway environment,and provide security guarantee and support for ship navigation.