多种基础的椭球面到平面，到空间直角坐标的互转(The interaction of various basic ellipsoids from plane to space Cartesian coordinates)

测量坐标转换程序。介绍了测绘中的坐标系、高程基准等基本概念。然后，就一些常见的坐标系的转换原理与程序给出了一个切实可行的操作方法。(Measuring coordinate conversion program. The basic concepts of coordinate system and elevation datum in surveying and mapping are introduced. Then, a prac