摘要
长江河道地形数据是水文泥沙监测与分析工作信息化的重要基础。针对多测次、多比例尺、多坐标系统、数据量巨大、现势性强的长江河道地形数据分析和管理困难的问题,提出了"归一起点,分块计算"的DEM生成方法,采用主题式的对象-关系数据库进行DEM的存储和管理,实现了长江河道DEM的可视化及其在水文泥沙专业分析中的应用。简要介绍了可视化的实现过程和应用情况。
Fluvial topographic data of Yangtze River channel is significantly fundamental to informationalization of hydrology and sediment analysis. In view of multi-measuring,multi-scale,multi-coordinating,giant-size problems of data analysis and managerial difficulties for Yangtze Channel,the generation methodology for DEM,characterized as started by one point,calculated by sections,is proposed. Further,the storage and management of DEM are conducted by theme-based,object-relation database,so as to realize the application of DEM visualization in specialized analysis on hydrology and sediment.
引文
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