gps convert xyz to neu

xyz2neu源程序，用于空间直角坐标系和球面坐标系之间的转换-xyz2neu source, used to convert the gps spherical coordinates with the space between the rectangular coordinates

XYZ坐标转为GLOBK或者QOCA中的NEU，以及大地测量中大地线反解问题，即由经纬度解算大地线长度-convert XYZ coordinates into NEU in GLOBK or NEU, and geodetic earth line inverse solution, that solution by the latitude and longitude Geodetic Line length

坐标转换加上示例坐标文件，代码可结合坐标转换公式进行学习(Coordinate conversion plus sample coordinate file, the code can be combined with coordinate conversion formula for learning)