I think that document is pretty much the ultimate tile reference for vanilla tiles. Props to you for coming up with the ideas for tunnel/bridges and all the things you added and for having condensed all of this discussion in a fleshed out document!
Thanks. I just wanted to put some examples together and ended up with a comprehensive guide of the tile notation plus the additions after a few days of work.

Meeple placement is a little more straightforward, since we only need a way to indicate on which road/city/field the follower is placed. For Knights KN,KE,KO,KS (knight north/east/south/west) and for some H&S tiles KNE/KNO etc. Pretty much the same for thieves (maybe a TI for T “internal”) is needed) and for non-internal farmers. Internal farmers seem a bit more problematic with this system.
Perhaps notating the continuation of a feature by keeping the same capitalization would solve this problem since we could put the type of the meeple followed by the letter of the feature they’re in. But perhaps there are more convenient ways.
Edit: Nvm, I came up with a far better idea. Just use the letter of the meeple+a number that denotes on which feature it’s placed. The numbers are assigned depending on the position of the city/field/road/cloister in the field notation. E.g. in CcR/R a T1 would be a thief on the south road and T2 on the east one. Since internal fields are also noted this solves that problem too. Let me know what you think of those methods. I personally feel this one is the best.
Figure placement requires:
1. Tile coordinates: We cannot assume the figure is placed on the last tile placed. Meeples can be placed with a magic portal or a flying machine. Meeples can be also placed on an acrobat tiles, on the Wheel of Fortune crown, on a district of the city of Leipzig or the city of Carcassonne.
2. Tile rotation: We need to take into account the rotation applied to the target tile.
3. Target feature: We can address the feature by type but assuming a meeple type can be a bit limiting as there are other figures. Consider the Mage, the Witch, the Fee, Gingerbread Man. Other figures have other placement requirements.
4. Figure identification: We need to define how to identify figures. Something like <player#/neutral>.<figure type>.<number>; for example:
- neutral.dragon.1: the dragon
- neutral.bigtop.1: the bigtop
- player1.normal.6: player 1's normal meeple #6
- player4.big.1: player 1's large meeple
- player6.shepherd.1: player 1's shepherd
What do you think?