Inner Sea World Guide River Kingdoms Map:
What are the red lines?
The key doesn't say (at least in my hard copy).
At first one considers that they are boundaries of the various kingdoms.
But that doesn't make sense because when you consider cities on the map, and the River Kingdoms companion book, several cities listed as belonging to Daggermark are within the red lines of Tymon (if they were borders).
Are they roads or river trade routes (as some are along obvious river routes)?
I'm totally confused by the red lines.
Bump! One-time only, get it while it's 1-degree above absolute zero!
They do appear to be political borders. Looks like a bit of a discrepancy between the maps and the text in the Guide to the River Kingdoms, which focuses on Tymon as an individual city-state rather than a capital.