基于MO的河道二维网格生成技术研究

Research on technology of two-dimension grid generation for river based on MO

针对传统贴体网格生成技术中由于对河岸线拟合偏差引起的河道网格化误差问题,提出了一种基于河流中心线的几何网格生成技术。通过拟合河流的中心线并利用MapObject(MO)在河流中心线上绘制椭圆将之与河道进行求交来实现对河流的二维网格化。经实验证明,提出的河流中心线几何网格生成法所生成的网格边界与河道边界完全重合,能更好地解决网格生成技术中的边界拟合问题。

This paper proposed a method for two-dimension river meshing which was based on the centerline of river.This method was on the researching of the technology of skin grid and combining with the technology of spatial operation for the control of MapObjects（MO）.The proposed method finished the process of the two-dimension meshing through fitting the centerline of river,drawing the ellipse on the centerline and getting the intersection for the ellipse and river boundary.The experiment shows,the boundary of the grid generated by the proposed method is overlap completely with the boundary of river bank,this method can solve the problem of boundary fitting better in the two-dimension river meshing.