The Kitamatsuura Peninsura, northwestern corner of Kyushu, is a region in which landslides occur very frequently. Among them, the slub slides occurred in the Tertiary strata is called the“Hokusho”-type landslide, and is the most characteristic of the region. In this paper, the topographic feature caused by many landslides are discussed regarding their remote causes controlled by lithof acies and geological structure of the Tertiary system, distribution of talus deposits on the pediment-like slope, relief of the base of the Hachinokubo Gravel Bed and the Matsuura Basalts which unconf ormably cover the Tertiary system. The writer pointed out that the undulating topography on the gentle slope of the cuesta is caused by the slub slides in the Tertiary strata, which are composed of alternation of sandstone and aggregated layer of shale, tuffaceous shale, tuff and coal seams. Four examples, which occurred recently in the area, are described with accompanying photographs and diagrams.

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A landslide near Urataguchi, western part of the Matsunoyama landslide district, Higashikubiki-gun, Niigata Prefecture, occured in August, 1962. The author measured amounts of displacement of the buildings, houses, etc. from the data of two topographic maps, drawn from aerial photographs which are taken before and after the beginning of the landslide. The results of measurement are shown in the contour map of amount of vertical and horizontal displacement. The shape and pattern of the landslide movements are considered based on the data of displacement and diffierences of minor relief between two photographs.

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The reviewed model deformation has been analysed and as a conclusion it appears that it is a good approximation if a stereo-model is regarded as a model having different scales in the three direction of model space.
The well known orthogonal transformation formulas have been modified to incorporate the different scales. The result is a more complicated transformation equation which may not be a disadvantage if high-speed computing technique is employed.
The examined practical examples reveals that the improvement in accuracy of determined ground coordinates using the more complicated traneformation, is about 10-25 percent, compared to the conventional transformation. The final conclusion, therefore, is that use of the proposed transformation may represent some value particularle in numerical cadastre.

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This paper is prepared to report and confirm the results obtained by Stecometer, because it is considered that the analytical triangulation is on the rail and the stecometer results became in concrete.
Using this stecometer since June 1966, although we were sufferred by mechanical troubles, we have observed 4, 360 models consisting of 2, 930 wide angle models and 1, 430 normal angle models by the end of February 1967.
The statistical observation was made on the maximum residual parallax standard deviation and its closure in relative orientation, and the vertical difference (delta Z) of pass points on adjoining models.
The models used for this purpose are 800 models of wide angle pictures excluding 20 models mistaken out of 4, 360 models above. The normal angle pictures were excluded in this study because of limited models available on hand.
We also added in this report the detail and frequency of mechanical troubles.
We shall be appreciated if the authorized people concern would advise us the maintenance of this stecometer which has many mechanical troubles for users.
We would like to review on normal angle pictures at the next time concerning to the results of relative orientation or topographical features such as mountaineous area and plain area.

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