A camera with a focal length of 20 cm fitted in an aircraft is used for taking vertical aerial photographs of a terrai The average elevation of the terrain is 1200 m above mean sea level (MSL). What is the height above MSL which an aircraft must fly in order to get the aerial photographs at a scale of 1 : 8000? (d) 2800 m (a) 2600 m (b) 3000 m (c) 3200 m

A camera with a focal length of 20 cm fitted in an aircraft is used for taking vertical aerial photographs of a terrai The average elevation of the terrain is 1200 m above mean sea level (MSL). What is the height above MSL which an aircraft must fly in order to get the aerial photographs at a scale of 1 : 8000? (d) 2800 m (a) 2600 m (b) 3000 m (c) 3200 m

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter14: Highway Surveys And Location

Section: Chapter Questions

Problem 8P

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A camera with a focal length of 20 cm fitted in an aircraft is used for taking vertical aerial photographs of a terrain. The average elevation of the terrain is 1200 m above mean sea level (MSL). What is the height above MSL at which an aircraft must fly in order to get the aerial photographs at a scale of 1:8000?
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1. A camera was equipped with a 152mm (6”) focal-length lens is used to take a vertical photograph from a flying height of 2780m above mean sea level. If the terrain is flat and located at an elevation of 500m: a.) What is the scale of the photograph? b.) What would be the scale at mean sea level?
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