利用七参数和四参数法实现不同椭球坐标系之间的转换-The use of seven parameters, and four-parameter method to achieve different ellipsoidal coordinate system transformation between

大地坐标系，经纬度 之间的转换，可用于地理 数据测控上，希望对读者有益-Geodetic coordinate system conversion between the latitude and longitude for geographic data monitoring and control, I hope the reader useful