Intrusive rock, may-be of Mesozoic, is found widely over the southern part of Hida plateau region, central Japan.
By means of photographic interpretation method, writer studied from various angles linerments of this area, and then compar d statistically joints and fractures in this rock-body through field observation with these linerments.
In this case, they were projected on Schmidt-net for finding the interdependence of dips and strikes, and the effect of dips to linerments.
The result showed that about 65 per-cent of the joints and fractures of rock-body are found as linerments on the surface.

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It is well known that aerial photographs are utilized for studying geomorphological features of landslide areas, for the reason that they are a miniature copy of the actual place.
The writer shows the ways of detecting minor patterns of relief, drainage, vegetation, land use, etc. Which are recognition elements of a landslide.
A landslide is represented as a form of geomorphological or geographical anomary on aerial photographs. Types of sliding movements be interpreted from abovementioned minor features.
References between geological structure and location of landslide, kinds of rocks and type of sliding movements are also shown in this paper.

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Aerial photographs are applied to geological studies in Yaku Island and northern mountainous district by Oze plain. The information interpreted from photographs is compared with the geological field data.
As the result, the auther found the followings;
1) The main direction of drainage analyzed from photographs is consistent with the main direction of weak zone, especially in the Granite mass, of Yaku Island.
2) In northern mountainous district by Oze plain, vegetation seems to corespond with distribution of rocks.
Future studies will be able to generalize these phenomena.

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Report of a test on photogrammetric measurements of the wind velocity at several altitudes over the Straits of Akashi to determine the local of changes wind is described.
Photographs are taken by simultaneous photographing the fireworks, provided parachutes, with two phototheodolites placed at the stations on the base line, at night.
Stereophotographs are measured with the first order stereoplotter.

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Different methods of the block adjustment of aerial triangulation are investigated in several countries.
In our method we used an electronic computer, whose capacity is only 2000 words. The process was divided into four steps and the computation for the X, Y, Z directions were performed simultaneously. It took 3.5 minutes per model for computing.
It satisfied our requirements for accuracy for practical use.

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