航道通航时空数据组织与可视化表达研究

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。

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

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.