基于空间几何原理的空间前方交会改进算法

Modified forward intersection algorithm based on the principle of space geometry

空间前方交会是摄影测量学重要的概念,通过空间前方交会可以确定待定点的物方空间坐标。在空间几何解析的基础上[1],根据摄站点、影像点、物方控制点坐标的空间几何关系计算像控点的空间坐标,然后求解待定点的像点空间坐标,从而在物方空间坐标系中进行空间后方交会计算。该方法表达形式直观,便捷实用,并通过实例验证该算法的有效性和正确性。

For photogrammetrics , the spatial forward intersection is a very important concept , through which the object spatial coordinates of unknown points can be determined through spatial forward intersection .T his paper calculates the spatial coordinates of image control points via the spatial geometric relations of photographic points ,the image control points and the control points ,based on the geometry of space analytic ,solves the image points’ spatial coordinates of unknown points afterwards , and then conducts the calculation of resection in the object spatial coordinate system .At last ,this algorithm proves to get the simple expression forms ,easy‐acceptance and practicability through examples in this paper .