基于辅助线的等高线生成三维地形算法研究

Research on Algorithm of Generating 3D Terrain from Contour Map Based on Auxiliary Line

针对从等高线地图读取地形数据和地形数据高程自动赋值两个问题,提出了基于辅助线的等高线地图提取三维数据的算法,同时实现等高线自动采样和高程自动赋值。利用山顶高程、等高距和等高线地图上任意计曲线的高程三个参数实现了等高线高程的自动计算和赋值。根据像素的孤立、连续特性,遍历等高线像素点,并按照一定的规则对等高线进行数据采样。总结了算法的特点,并用仿真实验验证了该算法的正确性和有效性。

Aiming at the problems in automatically sampling data from contour map and automatically assigning the terrain elevation,the data-sampling algorithm based on auxiliary line from contour map was designed,in which the data was automatically sampled,the terrain elevation automatically was assigned.The elevation was computed and assigned automatically according to the peak elevation,contour interval,and the elevation of any contour line.Based on the characters of isolation and continuity of pixels,the pixel points of contours were tracked,and the contour was sampled by some rules.At last,the characters of this algorithm were summed up,and its correctness and validity were proved by the simulation experiment.