MapInfo矢量数据到S57标准数据的映射研究与实现

Research and realization of the mapping from MapInfo vector data to S57 standard data

为提高内河助航能力,提出一种由Map Info矢量数据到S57标准数据映射的开发内河电子航道图的新方法.在重点研究Map Info通用交换格式矢量数据结构和S57标准矢量数据拓扑结构的基础上,建立详细的矢量数据结构模型;分析总结二者之间的差异性和映射关系,运用Helmert7参数转换法完成坐标系映射,采用累加去重的方法建立矢量数据拓扑结构,使用人工匹配方式设计对象及其属性的XML映射数据库,并构建矢量数据映射模型;最后,设计基于Linux平台的软件流程,在QT环境下实现该映射技术.映射后的电子航道图已成功加载到船载ECS系统上和上海埃威公司B类AIS终端设备上.试验结果表明了该映射方法的可行性和通用性及其实用价值,并为S100标准航道图的研究奠定了基础.

In order to improve the ability of inland river navigation, a new method on the development of electronic river navigation chart was put forward, which is the mapping from MapInfo vector data to S57 standard fiver chart. By focusing on the MapInfo common exchange format vector data structure and S57 standard vector data topological structure, the detailed vector data structure model was established, the differences and the mapping relations between MapInfo vector data and S57 standard charts were analyzed and summarized, the coordinates mapping was completed by using Helmert7 parametric conversion method, the vector data topological structure was re-established by accumulate method, while XML mapping database for objects and their attributes was designed by the way of artificial match to build vector data mapping model. Finally, software process was constructed based on the Linux platform, and this mapping technique was achieved in QT environment. The electronic inland river navigation chart after mapping was successfully loaded into the ECS of ships and the class B AIS terminal equipment of Shanghai Advanced Avionics Company. Results show that the mapping method is feasible with versatility and practical value. In addition, it provides the basic reference for the development of S100 standard navigation chart.