terjesc opened the ticket and wrote:

A way to detect all coastal tiles, not only non-tree ones, in order to find dock locations. May also be used for following coastlines or other purposes.

AITile::IsCoastTile() is in my opinion, from an AI writer's point of view, a very misleading name, since the method doesn't detect costal tiles with trees on. This seems to reflect the internal structure of openttd maps, but it can be very confusing if you don't know the internal workings of the game. I am in other words looking for a method that does what the name IsCoastTile suggests.

Reported version: trunk
Operating system: All

This issue was imported from FlySpray: https://bugs.openttd.org/task/3404