In this paper, the author discussed three points method in measurement of strike and dip on aerial photographs. As a result, it is emphasized that such measurement is highly depend on the balance between recognition of three points on same bedding plane and measurement procedure including calculation. And application of the streometer-type instrument with stereoscope will be enough for such measurement.

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Model deformation or displacement of picture points after absolute orientation is discussed as a fuction of observational error of photographic co-ordinates. As a simple example, the case of a mathematical grid plate is analysed by six point method with numerical discussions for two cases of observation : mono-ocular co-ordinate comparator method and stereo-comparator method. Further the author gives the influence of the error of geodetic co-ordinates of control points upon the displacement of model co-ordinates and an idea in selecting control points in accordance with the requirements for the accuracy of picture points in consideration.

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Recently he was awarded a Blue Ribbon Medal by the Government in recognition of his brilliant activities in the photogrammetric works in Japan.
I remember that :
In 1921, Japan came into possession of a Hugerschoff's Autocartograph, and in 1922, Mr. Ujifusa Kimoto put into practice the photogrammetry in Japan with this plotter.
Since then he devoted his entire career to the delopment of the photogrammetry in our country.

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