矿区地形等高线三次逼近内插算法研究

Research on Cubic-approximation Interpolation Algorithm of Terrain Contour in Mining Area

针对传统等高线内插法计算量较大、速度慢和坡度变化较大区域内插等高线不合理的局限性,采用等高线三次逼近内插算法,通过编写程序自动计算相邻等高线上的配对点,再利用配对点构成的辅助线对等高线进行合理分区,对每个区域进行等高线内插,使得内插等高线结果流畅、合理。通过对我矿区地形地貌基础数据建设项目1:2000DLG地形数据生产,实现地形等高线自动内插,工作效率成倍提高,缩短了项目工期,保障了成果质量。

In view of the unreasonable limitation of the traditional contour interpolation method that the calculation amount is large,Adopt the contour three-time approximation interpolation algorithm,automatically calculate the paired points on the adjacent contours by writing a program,and then use the auxiliary lines formed by the paired points to reasonably partition the contours,and carry out the contours in each area Insert,make the interpolation contour result smooth and reasonable.Through the 1:2000 DLG terrain data production of the basic terrain data construction project of our mining area,the automatic interpolation of terrain contours was realized,the work efficiency was doubled,the project duration was shortened,and the quality of the results was guaranteed.