DEM产品数据质量分析研究与系统实现

Research of DEM quality-precision analysis and system implementation

本研究针对不同地貌类型,对比分析了不同插值方法生成DEM的误差,总结分析误差的分布规律,探索了提高DEM精度的方法。DEM精度检查与分析软件改进了现有DEM插值软件算法的不足,具有很强的针对性,误差表达可视化效果好,提高了DEM数据质量检查的效率。

The precision of DEM was analyzed in full detail. A great deal of experiment based on SURFER was performed. The pertinent limition of SURFER was improved. Maps with larger error were interpoated over again, and the precision was improved. The system of DEM precision detection and analysis was developed, which included several functions such as workspace creation, vector browsing, attribute data modification, data format transformation, map border curing and meeting, DEM precision detection, precision analysis and precision visulization.