| Abstract: | The paper discusses a method of photogrammetric control for engineering problems which relies on reciprocal observations between instruments. Since photogrammetric networks do not usually permit cameras to point at one another, it is proposed that at least one additional theodolite station be used to establish these observations. This results in directly measured space triangles; in a sense the photogrammetric task becomes a surveying problem. Potential advantages are a more efficient use of mixed photogrammetric and survey measurements, a stronger network geometry and a direct solution for the orientation parameters of the instruments. Special attention must be given to targeting the camera and theodolite stations. |
