The adjacency bonus for improvements seems to be buggy in Alpha 3, though it had worked fine in Alpha 2. If you open the attached save, you can see that there are factories on Earth which have 4 adjacent factories yet which are only level 3, there is a level 1 factory with two adjacent factories, and there is a level 0 factory adjecent to the initial colony. Mars has a similar problem with its research labs adjacent to the initial colony.

If this is due to a negative level from terrain, where can I see the terrain type or its modifiers? No tool tip pops up when I hover over the tile, and I don't see the selected tile described anywhere on the planet management screen.

https://www.dropbox.com/s/jf0w8tbrr94tzrf/BuggyAdjacency.GC3Sav