Structure of database `worldbuild`

topLevel		secondLevel		tile
--------		-----------		----
id <int> <pk> <-|	id <int> <pk> <-|	id <int> <pk>
name <str>	|------	parent_id <int>	|------	parent_id <int>
status_id <int>		name <str>		status_id <int>
	|		status_id <int>			|
	|			|			|
	|			v			|
	|---------------------->|<----------------------|
				|
				|
status				|
------				|
id <int> <pk> <-----------------|
name <str>