数字高程模型与等高线的三维一体化快速生成

3D Integration Quick-speed Formation of DEM and Contours

介绍了三维虚拟环境中的数字高程模型与等高线一体化快速生成表达方法。首先讨论了基于移动拟合和移动加权平均两种算法快速生成数字高程模型的实现过程,提出在样点奇异区采用移动加权平均法替代移动拟合法插值可大大提高插值效率。论述了在三维可视化环境下数字高程模型与等高线一体化显示的原理和方法,重点对“三角面串序列法”进行了论述,并给出了其在流域治理规划应用中的实例。

The expression of quick-speed integration formation of DEM and contours under 3D and virtual circumstance is introduced in this paper. First, the realization process of quick-speed generating DEM based on two kinds of algorithms of mobile fitting and mobile weighted average method is discussed. The interpolation of that mobile fitting method replaced by mobile weighted average method can heighten greatly interpolation efficiency in the bizarre area of sampling point. Under 3 D visualization environment, the principle and method of DEM and contour integration display is discussed, and the triangle surface string sequence method is discussed in emphasis, too. At last, an actual example is given in the valley harnessing planning application.