TCU MAP OF SERVO WASTEGATE

hello
I wanted to know how I know what should be the position of the WASTEGATE servo at different heights in a different throttle at different temperatures. 

For example:

If I throw the throttle to 115% then the TCU knows roughly what the position of the WASTEGATE servo should be and then it fixes depending on the adjusting of the WASTEGATE cable

The TLR software has a MAP screen and I wanted more explanations about the screens (attachments file for example) 

Can anyone give me an answer?

Thank you