摄影测量中单像空间后方交会的程序，可以利用4个点求解相片外方为元素-Photogrammetric space resection of single, as the procedure can take advantage of four-point solution for the elements of the foreign photos

双向解析空间前方交会后方交会,方便的计算前方后方交会，给摄影学测量带来方便。-Resection of bi-analytic space intersection to facilitate the calculation of the front resection in photography measurement convenience.