You are looking at Gobblydegook on a computer screen :-)
Measurement is not mandatory. I recommend that you read the Room Set Up and other articles at RealTraps and GIK. The wisdom there is true of every room. Follow that advice and you will be 90% there. If you really want to Measure, I wrote this for you.
http://www.gearslutz.com/board/studi...primer-v2.html
DD