Recent advance of the structural engineering requires the experimental analysis of the big scale structure based on the far more accurate measurements than those taken in the conventional way. In this respect, the analytical terrestrial photogrammetry has been remarked as an effective method of the accurate three dimensional measurement. Dr. H. M. Karara reported in his paper, “On the precision of stereometric systems”that the analytical data process of the stereoscopic photographs taken with the convergent angle of about 60 degrees and base-high ratio about 1: 1 gave the best result in precision both from the mathematical model of simulation and from the experiments. However, the analytical method ever developed was simply derived from that of the analytical aerial photogrammetry. On the contrary, we have developed a new analytical method taking the particular property of the terrestrial photogrammetry into consideration. The main aimes of this method are;
1. to make higher the precision of the measurement by the analytical approaches.
2. to make possible the analysis of the convergence photogrammetry using the digital computer so that we can choose positions and directions of the stereometric camera without regard to the constraints of the plotter.
3. to enable to consider the weight of the precisions of the ground control survey.

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This paper describes some evaluation tests have been carried out on AKITAMACHI G.S.I. base line and on the base line in College of Construction, and some new methods of control point survey, by means of DISTOMAT DI-10.
The results of test confirm that the accuracy is free from measured distance and equivalent or even superior to other Electro-optical distance measuring equipment in the market.
It is prooved that this instrument is valuable tool to improve overall accuracy and efficiency of phtogrammetry, because of easy and simple operation.

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The debris produced at so-called“ Osawa Rock Fall”located along the west slope of Mt. Fuji are transported through the narrow stream called“Iwa Toi”and make big deposits on“ Osawa Fan”area. Topographic and quantitative variation of“ Osawa Fan”are discussed in this paper. Airphotogrammetric plofile survey comparing the airphotographs taken in three different stages, geologic and topographic field survey are carried out for this purpose. Results of this study are as follows;
1) This area is formed of four topographic planes, such as the original plane consisting of Fuji volcanic ejectas, the plane of old stage fan, of middle stage fan and of new stage fan. Exactly, the last plane is classified to high and low-level plane along the streams.
2) Topographically, Osawa fan area is classified to some sections such as the transporting section, the transporting section accompanying some deposition, the depositting section the reeroding section of fan deposits and the re-depositting section.
3) In this area the total volume variation of river bed deposits increased 195, 900m³in volume during 4 years from 1958 to 1962 and decreased 170, 600m³ from 1962 to 1967.
4) Debris derived from Osawa Rock Fall are not transported directly toward the lower area of the fan, but deposit temporarily at the upper part of the fan, then re-erosion is open from the front zone of the deposits to transport them to the lower parts to form small fan gradually. The range of deposition of fan also deviated gradually from north to south.

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North-East China (Manchuria) had been occupied by Japanese army from 1930 till the end of II world war. During that time very big scale air photo application works had carried out for purpose of forest area survey.
That was a remarkable fact for air photo application history. But these results was almost burn to ashes and records was scattered and lost at the time of the defect of Japan. Fortunately this report unveiled the out line of this works.

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[in Japanese]

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