i was thinking of how we would label each square.
maybe we could do it like this:
each large square is 2 units x 2 units
each small square is 1 units x 1units
then, the bottom left corner is position 0,0
the position of each zone is x,y, where x is the amount of units horizontally from the bottom left point to the bottom left corner of specified zone. y is the amount of vertically from the bottom left point to the bottom left corner of the specified zone. If a position does not fall on the bottom left corner of any zone, but lands in a zone, then it designates that zone anyways