View Full Version : estimating lenth from a distance
01-05-2006, 12:56 PM
Is there a formula to estimate the lenth or diameter of a structure from a distance if you know how far from the object you are standing. Can you hold up a transparent ruler for instance and measure the object as 5 inches?
01-08-2006, 07:50 PM
I think you can. I have seen several golf tools that calculate the distance to the hole based on how high the flag is. Since the flag is a set height you can calculate with our good friend geometry.
You would need to know more information though.
Take a piece of paper, and draw a right triangle.
side a would be the height of the object, side b would be the distance you are standing from the object.
Since you know the length of side b, you only need to know the angle A to calculate side a.
Possibly lay a protractor flat on the ground, and look at the top of the building to estimate the angle?
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