确定最短航程的投影坐标转换模型

Transformation Model of Projecting Coordinates on Shortest Route

在描述计算“最短航程”距离及方位角方法的基础上 ,提出利用“球心投影”法建立的球面与平面间的坐标转换模型 ,并且给出了在平面上描述最短航程的轨迹方程 .对问题的研究基于球面三角 ,同时借助了能将空间几何问题确切地表示在平面上的多面正投影方法 .

The paper gives out the method for deciding the shortest route and azimuth and establishes the projection relationship between plane and spherical surfaces. By drawing the straight line we can solve the problem of the shortest route without any calculation on the plane. The paper also builds up a mathematical model which can change the spherical information to the plane that by the method of graphic combined with calculation by means of projection.