Due to the several updates, fixes, expansions of Island, addition of so much more contents.
The game and mechanics have changed so much.

Introduction of the Lighthouses, makes expanding the fields easier, larger and clearer.

Same as way before, Sheds > Warehouses > Lighthouses.

A preview of the mainland.
30 Warehouses, 10 Lighhouses.

10~11 Lighthouses should maximize the entire field now.
Only a small increment with the 11th.
Easily seen by looking at the Length of the number of tiles, 31 Horizontal.

Compared to the past, the many rows of warehouses, life is so much simpler now,
thanks to Lighthouses.

Start producing Sheds early on,
switch to mass Warehouses as soon as able to.


Main Land



The size of the field would stop expanding once
it reaches the lower center Pine Tree top. ( displayed in the yellow box ).



Island


The size of the field would stop expanding once
it reaches the left Coconut Tree leaf edge. ( displayed in the yellow box ).




Not some big discovery.
Just sharing information.