渡海空中三角測量について

(水路測量における写真測量の利用 [5] )

抄録

We thought, the possibility of application of the aerial photogrammetry to our hydrographic surveying is very high. In practics, owing to our efforts, it has become possible in our office from 1963, to deside the position of hydrographic controls by the analytical aerial triangulation. Generally speaking, the occupation-rate of sea surface in photoimage for the aerial photographs utilized in the analytical triangulation on the hydographic surveying area is comparatively large. We assume the aerial photographs that its occupation-rate of sea is 100%, and if in the triangulation by the series contained these aero-photographs, the cantilever process will be possible in the ordinary accuracy, we could carried out hydrographical triangulation more economically.
In 1967, we had a plan of the first experiment as for the over-sea aerial triangulation in Tokyo Harbour. The result of this experiment was considered to be satisfactory, but in order to investigate the essential problems, that is, the phenomena of error propagation in the over-sea triangulation, we made the simulation on the over-sea triangulation. This paper reports a practical results in Tokyo Harbour and a part of the results of the simulation, as for the over-sea analytical aerial triangulation.