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I wonder if I can get the height of an object (tree or a building) with the knowledge of:

  • The distance between me and the object?

  • The apparent height of that object?

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What do you mean with apparent height? –  Bernhard Aug 5 '12 at 9:46
    
I found this topic: en.wikipedia.org/wiki/Perspective_(visual) the apparent height is the height as seen by eye –  Smartdog Aug 5 '12 at 11:00

1 Answer 1

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You can hold a ruler or meter stick (real or imaginary) at the end of your arm.

Suppose you are 50 meters away from the object, and suppose your arm is 1 meter long.

Then take the height of the object as it appears on the ruler, and multiply by 50.

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I found the answer 2 minutes after posting the question but wanted to make sure I got it right :) –  Smartdog Aug 5 '12 at 11:01

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