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Civil Engineering

GATE CE concept:flying-height PYQs

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GATE CE syllabus

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Question 30

Open question
CE2MCQ1 markNeeds review
For a reconnaissance survey, it is necessary to obtain vertical aerial photographs of a terrain at an average scale of 1: 13000 using a camera. If the permissible flying height is assumed as 300 m above a datum and the average terrain elevation is 1050 m above the datum, the required focal length (in mm) of the camera is
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