Proof of Hidden Springfield Heights Land!!!!

I have taken the time to screen shot my Springfield Heights (casfan7) with a friends Springfield Heights (brokegrannie)

I have made an enclosed PNG from the Ocean along the back Mountain side to the area that is dark green and cannot be bought/or earned through items. NOTE: I may be a few pixels off however I tried to match as closely as possible. I must state being a few pixels off would not make the difference seen.

I have earned all of my available Springfield Heights land and there is no more to craft for or buy. As you can see and I urge someone to friend brokegrannie, to see first hand - brokegrannie Springfield Heights land extends maybe three rows further from back Mountain to dividing Springfield Height and Springfield Mountains.

Note all my other friends that have earned all there Springfield Heights land have the same area I have. brokegrannie is the only example I have of Hidden Springfield Heights land.

I wonder how all users can get this hidden land that is out there.