image - Measurements from a picture -

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i´m trying recreate surrounding in unreal engine 4. sadly i´m total loser when comes math. took picture of building. know door in picture 183 cm high , 103 cm wide. there way calculate whole length of building when know size of door?

or in other words: how calculate distances in picture when know measures of 1 object in picture?

if have answer nice if described process come answer.


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