大地测量学基础，B,L,H==>X,Y,Z，X,Y,Z==>B,L,H，大地问题正解,大地问题反解,3度带或6度带高斯投影正解,3度带或6度带高斯投影反解-Geodesy base, B, L, H ==> X, Y, Z, X, Y, Z ==> B, L, H, land issues positive solution, anti-earth problem solution, with 3 degrees or 6 degrees with a Gaussian projection positive solution, with 3 degrees or 6 degrees with Gauss projection Reverse