Processes are mentioned for the procurement of some hundreds wide cross section date and Grid coordinates, and the calculation of earth work quantities from grid coordinates.
A report on some experimental works for highway engineering that performed in good results.

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The author gives the general treatment of successive orientation of models from the stand point of analytical method. By applying the above, he derives the equations to get errors in successive orientation as the functions of observational errors of photographs for relative orientation. As an expample for small relative orientation elements, he gives the case of treating two adjacent models, each of which is a mathematical grid plate oriented by six point method, and analyses the errors with numerical discussions, such as those of scale factor, model co-ordinates and the discrepancies at pass points which are common to the adjacent models.

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These are the second experimental works on the vertical accuracy of aerial photographs as a continued report of Vol.1, No.3 in 1962. The aerial photographs at a scale of 1 : 7920 taken by the RC 8 camera with the Aviogon lens were measured with the stereoplotting machin A 8 (No. 1207) independently by four men.
As for as these experiments are concerned, we recognized to be fully effective for the ordinary engineering purpose.

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