(b) Photographs of a certain area were laken from P and Q , iwo camera stations, 110 m apart. The focal length of the camera is 145 mm . The axis of the camera makes an angle of $60^{\circ}$ and $40^{\circ}$ with the base line at slations P and Q respeclively. The image of the point A appears 21.2 mm to the right and 15.4 mm above the hair lines on the photograph taken al $P$ and 34.2 mm to the lell on the photograph taken at $Q$. Calculate the dislance $P A$ and QA and the elevation of the point A, if the elevalion of the instrument axis at $P$ is 125.360 m . 13 (a) How can you compute the horizonlal angles and azimuth of a line from lerrestrial pholographic measurements?
Explanation
The problem involves using photogrammetry principles to calculate the distance and elevation of a point from two photographs taken from different camera stations. The given measurements and angles are used to form two triangles and solve for the distances and elevation.
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