Finding The Start Of An Eased Curve

I know that I'm posting TS stuff in a TSW forum but there is no dev area on the TS forum.

How can I properly determine the start of an eased curve? I have tried shifting the start of it quite a lot but it never matched up.

 

I am assuming you're talking about a non-fictional routes?

 

Yes, I'm talking about a real route as you can see from the coordinates.

 

I got it. The curve changes it's radius in the middle from 1600 to 2600 meters, which is the reason why it never lined up.

 

Yeah that's called a compound curve. Those are especially difficult to plot. Glad you figured it out.