I should have explained the code block & its context.
Each line is a group of colocated points, so many of them are surely correct. (So yes, RUS/BLR vs BLR/RUS etc. are legit.)
There are 1 or 2 mismatches on each line, a "one of these things is not like the other" thing.
RUS A340: RUS/MGL -> RUS/MNG
TZA RTR15: KEN/TZA -> UGA/TZA
And of course what you both already commented on.
I'll fix that and look for others like it
No big need to treat looking for more as a priority IMO. While
the search that yielded these wasn't exhaustive (it only looked at cases with 3+ colocated points),
this can become a datacheck. It would only miss:
• Routes ending at a region boundary with no colocated points
• Cases of
all colocated points at the boundary listing the wrong two regions --
unless...