Photogrammetric space intersection requires image coordinates of a point in space to be digitized

on two or more photos. In digital photogrammetry or in single photo digitizing, it is difficult

to locate the matching image of poorly defined points on different photos. A mathematical technique

has been developed that requires only that lines or features be digitized on different photos

without the need to digitize the same image points to perform the intersection. This method is very

useful in single photo digitizing and 3D robot vision.