X-BTF: Mysterious yellow squares

[Nethog]

Ok I give up, what are the small yellow squares I see on my navigation map just above the symbol for each Station? I have seen none, 1, 2 and 3 squares.

[Alan Phipps]

Probably the same as in X2. Although that was not always agreed upon as further shown here. Take your pick, either showing factory tier or just a differentiator.

[Nethog]

Thanks Alan. Haven't not yet played any X series game yet except XBTF, and having only explored 2 sectors (Seizewell and Profit Share) it appears that the number of squares help differentiate stations with the same letter code on the nav map. Here are my observations where this rule is valid across the 2 sectors:
n:
1 square: Flower Farm
2 squares: Teladianium Foundry
3 Squares: Dream Farm

F:
1 square: Sun Oil Refinery
3 squares: Bliss Place

M:
1 square: Ore Mine
2 squares: Silicon Mine

Here are results where there is only 1 data point, so no conclusion can be made until I explore more of the universe:
L:
1 square: Beta I.R.E. Laser Forge

R:
3 squares: Space Missile Factory-> Silkworm Missiles

S:
1 square: Shield Armor Production Facility-> 1 MW Shields

And finally, there are NO yellow squares for Solar Plants, Space Equipment Docks, Trading Stations, and Shipyards, so I assume that there is never more than one station type for the symbols associated with these facilities.

[jlehtone]

Based on those I do predict that you might find:
n:
3 squares: Dream Farm


The Missile and Shield Factories ... what is their product?

[Nethog]

Based on those I do predict that you might find:
n:
3 squares: Dream Farm


The Missile and Shield Factories ... what is their product?

I just built a Dream Farm and confirm that 3 yellow squares are displayed.
The Missile Factory produces Silkworm Missiles and the Shield Factory produces 1 MW Shields.

I will update my original post with this info.