What is this?
A collection of perfect ratio arrays that are passable, in a way or another.

Arrays "A" and "B" are passable. (you can pass through them on foot)
Arrays "C", "D" and "E" are passable. (they are acceptable arrays!)
:^)
The numbers
(calculations done thanks to this reddit post and google sheets page)

Every array in this book has a perfect 0.84 ratio. That's what makes them acceptable!
The most space efficient 'prints are: C, C_2, D_2 and E_2 with a space efficiency of 0.965625.
Note: some power poles and/or lamps are shared by adjacent arrays.
This pictures show the area of one "tile" (green area) compared to the blueprint's footprint (pink area)
Space efficiency is calculated using the green numbers.

The arrays
Type "A" has embed walkways. Type "B" does as well but includes some laser turrets, for some reason.
Types "A" and "B" both come with:
- an alternate version with embedded radar+roboport
- a "paving" blueprint with a stone brick path. (the rightmost arrays in the picture have their path applied)
Type "C" is the most compact version. (but it's asymmetrical!!)
Types "D" and "E" occupy the same area but use medium power poles and substations respectively.
Types "C", "D" and "E" all have a "double" version. (C_2, D_2 and E_2 respectively)
They differ in style but share the same stats, apart from power pole counts.
The array between my car and me is "Prototype 1". I included it as a bonus 'cause it's what started them all and I thought it was cool.
Click this picture to go to an imgur post showing tiling examples, roboport placement patterns, as well as some additional info.

That's it i guess! Have fun and good luck in your future endeavors. : )
