一种DEM套合自动检查算法的设计与实现

The Design and Implementation of Auto-Checking Algorithm of DEM Registration

检查DEM(Digital Elevation Model)与相应DLG(Digital Line graph)的等高线套合是否合理是DEM产品生产质量检查中的重要内容。本文从生产实际出发,针对DEM数据特点与现有DEM套合检查的缺点,提出了一种自动检查DEM套合检查算法,并基于C#.Net给予了实现。通过在国家基础测绘1:50 000测图项目中的实践应用,结果表明该算法检查结果正确、可靠、算法性能稳定,与人工方式相比,可以大大提高DEM套合检查的自动化程度和准确度,从而提高生产作业效率。

Checking if the matching of DEM （Digital Elevation Model） and the corresponding DLG （Digital Line Graph） contour is reasonable is important to check the contents of the DEM production quality inspection. From production reality, a new algorithm for auto - checking of DEM matching with DLG - contour is proposed according to DEM data characteristics and shortcomings of the exist- ing DEM matching check,, and given implementation based on C#.. Net.. Through the practical application of the national basic sur- veying and mapping in 1 ： 50 000 mapping project, the results show that the algorithm is correct, reliable, and stable. Compared to the artificial checking, it can greatly promote the automation and accuracy of the DEM matching check to improve the efficiency of produc- tion operations.