利用高斯消元法解L系数，新手上路，很方便。-Using Gauss elimination solution L coefficient, novice road, very convenient.

利用Visual C++实现空间后方交会。先DLT解算提供外方位元素初始值，然后后方交会-Visual C++ implementation using space resection. First DLT solver exterior orientation provided the initial value, then resection