基于多源数据的河道不规则三角网构建方法

A New Method for Building TIN of River Channel Based on Multisource Data

河道不规则三角网是数字河道地形的基础,是河床演变定量分析和进一步河势分析的前提。对河道不规则三角网的构建方法进行了研究,分析了三角网不平滑和与地形不符的异构三角形出现的原因,提出了基于河道测点和大比例尺DEM、河道深泓线、等深线的河道不规则三角网构建方法。通过长江镇扬河段的河道三角网构建实验,表明该方法在保证与实际地形吻合的前提下有效地解决了以上问题,切实可行。

The TIN of river channel is the base of the digital terrain, and is the precondition of quantitative analysis for riverbed evolution and river regime. The digital method of building TIN is researched here, then the distorting triangles causing the TIN inequality and disaecorded terrain are analyzed, finally a new method for building the TIN of river channel is put forward. Through the experiment of building the TIN of Zhenyang reach of Yangtze River, it is showed that the problems above-mentioned are solved effectively according to the practical terrain, so it is feasible.